JPS62277587A - Neutron converter - Google Patents
Neutron converterInfo
- Publication number
- JPS62277587A JPS62277587A JP12067686A JP12067686A JPS62277587A JP S62277587 A JPS62277587 A JP S62277587A JP 12067686 A JP12067686 A JP 12067686A JP 12067686 A JP12067686 A JP 12067686A JP S62277587 A JPS62277587 A JP S62277587A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- phosphor
- 6lif
- sensitivity
- neutron converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002245 particle Substances 0.000 claims abstract description 54
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 229910052709 silver Inorganic materials 0.000 claims abstract description 11
- 239000004332 silver Substances 0.000 claims abstract description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 67
- -1 silver-activated zinc sulfide Chemical class 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 230000031700 light absorption Effects 0.000 claims description 2
- RDVQTQJAUFDLFA-UHFFFAOYSA-N cadmium Chemical compound [Cd][Cd][Cd][Cd][Cd][Cd][Cd][Cd][Cd] RDVQTQJAUFDLFA-UHFFFAOYSA-N 0.000 claims 5
- 230000035945 sensitivity Effects 0.000 abstract description 43
- 229910052984 zinc sulfide Inorganic materials 0.000 abstract description 18
- 239000000463 material Substances 0.000 abstract description 17
- 239000011248 coating agent Substances 0.000 abstract description 14
- 238000000576 coating method Methods 0.000 abstract description 14
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000002904 solvent Substances 0.000 abstract description 4
- 239000002270 dispersing agent Substances 0.000 abstract description 2
- 239000004014 plasticizer Substances 0.000 abstract description 2
- 239000005083 Zinc sulfide Substances 0.000 abstract 2
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 abstract 2
- 239000010408 film Substances 0.000 description 11
- 239000011701 zinc Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 4
- 238000002601 radiography Methods 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000000020 Nitrocellulose Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920001220 nitrocellulos Polymers 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- FERIUCNNQQJTOY-UHFFFAOYSA-M Butyrate Chemical compound CCCC([O-])=O FERIUCNNQQJTOY-UHFFFAOYSA-M 0.000 description 1
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Natural products CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000875 Dissolving pulp Polymers 0.000 description 1
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 1
- 229910001864 baryta Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 229920001727 cellulose butyrate Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001249 ethyl cellulose Polymers 0.000 description 1
- 235000019325 ethyl cellulose Nutrition 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 229910052950 sphalerite Inorganic materials 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Conversion Of X-Rays Into Visible Images (AREA)
- Measurement Of Radiation (AREA)
- Luminescent Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
3、発明の詳細な説明
〔産業上の利用分野〕
本発明は中性子ラジオグラフィー等に使用される中性子
コンバーター(以下、単に「コンバーター」と略称する
)に関する。更に詳しくは被写体の中性子透過度情報を
効率良く近紫外光又は可視光に変換してフィルム、撮像
管等の光検出手段に伝達し、画像化するためのコンバー
ターの改良に関する。Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a neutron converter (hereinafter simply referred to as "converter") used in neutron radiography and the like. More specifically, the present invention relates to an improvement in a converter for efficiently converting neutron transmittance information of an object into near-ultraviolet light or visible light, transmitting it to a light detection means such as a film or an image pickup tube, and converting it into an image.
中性子ラジオグラフィーは熱中性子の物質透過時の減衰
特性が通常の非破壊検査に用いられるX線やγ線と異な
ることを利用して、X線やγ線での検査が困難な水素含
有化合物や、金属と軽元素物質から成る複合材料の検査
に有効で、原子炉材料、ロケット用大工品、航空機用ジ
ェットエンジン部品等の検査に使用されている。Neutron radiography takes advantage of the fact that the attenuation characteristics of thermal neutrons when they pass through a material are different from those of X-rays and γ-rays used in normal non-destructive testing, and can be used to detect hydrogen-containing compounds and other compounds that are difficult to inspect with X-rays and γ-rays. It is effective for inspecting composite materials consisting of metals and light element materials, and is used for inspecting nuclear reactor materials, rocket carpentry, aircraft jet engine parts, etc.
中性子ラジオグラフィーには中性子吸収断面積が大で中
性子と原子核反応をおこし易い元素を含む材料の単独使
用もしくはそれらと螢光体との混合材料からなるコンバ
ーターと写真フィルムとを組合せる写真フィルム法が主
流に用いられているが、この場合のコンバーターの材料
としてはGdメタノベBNとZnS:Ag螢光体の混合
物、Gd2O,S : Tb螢光体、6LiFとZns
: Ag螢光体の混合物、Gd2O3とZnS :
Ag螢光体との混合物等が用いられ、これらの材料をプ
ラスチック、アルミニウム等からなる支持体の片面に積
層して使用に供される。For neutron radiography, there is a photographic film method that combines a converter made of a material that has a large neutron absorption cross section and contains an element that easily causes a nuclear reaction with neutrons, or a converter made of a mixed material with a phosphor and a photographic film. Mainly used, the converter materials in this case include a mixture of Gd methanoben BN and ZnS:Ag phosphor, Gd2O,S:Tb phosphor, 6LiF and Zns.
: Mixture of Ag fluorophores, Gd2O3 and ZnS :
A mixture with Ag phosphor or the like is used, and these materials are laminated on one side of a support made of plastic, aluminum, or the like.
従来から知られているこれらのコンバーターの中でGd
メタルを使用したコンバーターの螢光体を用いないコン
バーターでは、鮮鋭度の優れた画像が得られるものの感
度が低く、原子炉からの中性子を線源とした場合でも例
えばフラックス量がL 2 X 10’ n /cof
/secの中性子束を照射シテ充分な画像を辱るために
は10〜20分間の照射が必要であり、放射される中性
子束の少ない小型サイクロトロンを線源として用いると
撮影に要する時間は更に長時間となる。これに対して螢
光体層からの中性子吸収断面積が大であるGd2O□S
;Tb螢光体等や、B N、 Gd2O3,6LiF等
の中性子吸収断面積が大である物質と螢光体との混合物
から成るコンバーターは感度が比較的大であり、これら
の中でも6LiFと2nS : Ag螢光体との混合物
から成るコンバーターは、Gdメタルから成るコンバー
ターの数10倍〜100倍の感度を有するため、撮影時
間が大幅に短縮できる反面、得られる中性子像の画質が
悪く、実用上不満足であるところから、これら従来のコ
ンバーターに比べてより高感度で鮮鋭度の優れた画像の
得られるコンバーターの開発が望まれていた。Among these conventionally known converters, Gd
A converter that does not use a phosphor instead of a metal converter can provide images with excellent sharpness, but the sensitivity is low, and even when neutrons from a nuclear reactor are used as a radiation source, for example, the flux amount is L 2 X 10' n/cof
Irradiation with a neutron flux of /sec requires 10 to 20 minutes of irradiation to obtain a sufficient image, and if a small cyclotron, which emits less neutron flux, is used as a radiation source, the time required for imaging will be even longer. It's time. On the other hand, Gd2O□S has a large neutron absorption cross section from the phosphor layer.
; Converters made of a mixture of a fluorophore and a substance with a large neutron absorption cross section, such as Tb fluorescer or BN, Gd2O3, 6LiF, etc., have relatively high sensitivity; among these, 6LiF and 2nS : A converter made of a mixture with Ag phosphor has a sensitivity several tens to 100 times higher than a converter made of Gd metal, so it can significantly shorten the imaging time, but the quality of the obtained neutron image is poor, making it impractical. Because of these unsatisfactory conditions, it has been desired to develop a converter that can provide images with higher sensitivity and sharpness than these conventional converters.
本発明は上述のような状況に鑑みてなされたものであり
、従来のものに比べて特に高感度で、鮮鋭度の向上した
コンバーターを提供することを目的とする。The present invention has been made in view of the above-mentioned situation, and it is an object of the present invention to provide a converter with particularly high sensitivity and improved sharpness compared to conventional converters.
本発明者等は上記目的を達成するため、’LiFと銀付
活硫化亜鉛カドミウム系螢光体((Zn、8、Cd、
)S : Ag )との混合物からなるコンバーターが
特に高感度であることに注目し、6LiFおよび(Zn
+−、、Cd、 )S : Agの混合比、粒子径分布
、これらの調製法等について詳細に研究した結果、その
構成成分の1つであり、自からは全く発光しない6Li
Fの粒子径分布によっても、また( 2nl−x、Cd
、、)S : Ag螢光体の粒子径分布によっても1尋
られるコンバーターの感度並びに鮮鋭度が大きく変化し
、特に従来のものより粒子径の大きい’LiFを用いる
ことによって、また従来のものより粒子径のより小さい
(2J−x 、 CdX )S : Ag螢光体を用い
ることによってより高感度で高鮮鋭度のコンバーターが
得られ、更に螢光体層中の結合剤樹脂量を減少させるこ
とによっても高感度で高鮮鋭度のコンバーターが得られ
ることを見出し、本発明を完成させるに至った。In order to achieve the above object, the present inventors have developed 'LiF and silver-activated zinc sulfide cadmium-based phosphors ((Zn, 8, Cd,
)S:Ag) is particularly sensitive, and 6LiF and (Zn
+-,,Cd, )S: As a result of detailed research on the mixing ratio of Ag, particle size distribution, and their preparation method, we found that 6Li, which is one of its constituents and does not emit any light on its own,
Depending on the particle size distribution of F, (2nl-x, Cd
,,)S: The sensitivity and sharpness of the converter, which are also affected by the particle size distribution of the Ag phosphor, change greatly.In particular, by using 'LiF, which has a larger particle size than the conventional one, By using a (2J-x, CdX)S:Ag phosphor with a smaller particle size, a more sensitive and sharper converter can be obtained, while also reducing the amount of binder resin in the phosphor layer. The inventors have discovered that a converter with high sensitivity and high sharpness can also be obtained by the following methods, and have completed the present invention.
すなわち、本発明のコンバーターは支持体と、この支持
体上に設けられた螢光体層とを有し、該螢光体層が結合
剤中に分散された6LiFと銀付活硫化亜鉛・カドミウ
ム系螢光体((Zn+−x、Cd、 )S : Ag
、但し、Xは0≦X≦0.6なる条件を満たす数である
。以下、同様である)との混合物から成り、前記6Li
Fの平均粒子径が5μm乃至20μmであることを特徴
とする。That is, the converter of the present invention has a support and a phosphor layer provided on the support, and the phosphor layer contains 6LiF and silver-activated zinc sulfide/cadmium dispersed in a binder. System phosphor ((Zn+-x, Cd, )S: Ag
, where X is a number that satisfies the condition 0≦X≦0.6. The same applies hereinafter), and the 6Li
It is characterized in that the average particle diameter of F is 5 μm to 20 μm.
本発明のコンバーターは例えば次のような方法により製
造される。The converter of the present invention is manufactured, for example, by the following method.
まず、特定粒子径の6LiF、(2n、 、、Cd、
)S :Ag螢光体並びに結合剤を適当な溶剤中に添加
し、更に必要に応じてこれに増感紙の螢光体層を作製す
る際通常用いられている分散剤、可塑剤等を加えてこれ
らを充分に混合して螢光体塗布液を調製する。混合比〔
螢光体塗布液中の6シIFと(2n1−、、CdX)S
: Ag螢光体との総重量〕;〔結合剤の重量〕は一
般には1: 1〜100:1の範囲で使用され得る。し
かし、6LiF と(Zn+−x 、CdX)S :A
g螢光体との総重量に対する結合剤重量が多くなると結
合剤による中性子の吸収及び散乱のためにコンバーター
の感度が低下すると同時に鮮鋭度(解像度)も低下する
傾向がみられ、また逆に、結合剤量が少なくなりすぎる
とコンバーターの強度が著しく低下する。従って、特に
高感度でかつ高鮮鋭度の優れたコンバーターを得るため
には、螢光体塗布液中の6LiFと(Zn+−X N
CdjS 二Ag螢光体の総重量と結合剤との混合比を
5:1〜20:1の範囲で選択するのがより好ましい。First, 6LiF of a specific particle size, (2n, , Cd,
)S:Ag phosphor and binder are added to a suitable solvent, and if necessary, a dispersant, a plasticizer, etc. that are commonly used in preparing the phosphor layer of an intensifying screen are added to this. In addition, these are sufficiently mixed to prepare a phosphor coating solution. mixing ratio〔
6IF and (2n1-,,CdX)S in the phosphor coating solution
: total weight with Ag phosphor]; [weight of binder] can generally be used in the range of 1:1 to 100:1. However, 6LiF and (Zn+-x, CdX)S:A
When the weight of the binder increases relative to the total weight of the phosphor, the sensitivity of the converter decreases due to absorption and scattering of neutrons by the binder, and at the same time, the sharpness (resolution) also tends to decrease. If the amount of binder is too small, the strength of the converter will be significantly reduced. Therefore, in order to obtain an excellent converter with particularly high sensitivity and high sharpness, it is necessary to combine 6LiF and (Zn+-X N
More preferably, the mixing ratio of the total weight of the CdjS diAg phosphor to the binder is selected in the range of 5:1 to 20:1.
次いで上記のようにして調製された螢光体塗布液をロー
ルコータ−、ナイフコーターなどを使用する通常の塗布
手段によって通常の紙、バライタ紙、カーボン、二酸化
チタンなどの顔料を含有するピグメント紙、アルミニウ
ム箔などの材料で出来た支持体上に均一に塗布し、乾燥
させて螢光体層を形成する。更にこの螢光体層の表面に
螢光体層を保護するために光を透過し得る透明なプラス
チック薄膜からなる保護膜を設けても良く、この場合に
は螢光体層上に例えば酢酸セルロース、ニトロセルロー
ス、ポリメチルメタクリレート、ポリビニルブチラール
、塩化ビニル・酢酸ビニル共重合体等の透明な高分子物
質を適当な溶剤に溶解して調製した溶液を塗布し、乾燥
させて保護膜とするか、ポリエチレンテレフタレート、
ポリエチレン、ポリアミド等の透明な薄膜を螢光体層表
面にラミネートし、本発明のコンバータを得る。Next, the phosphor coating solution prepared as described above is coated on ordinary paper, baryta paper, pigment paper containing pigments such as carbon, titanium dioxide, etc. by ordinary coating means using a roll coater, knife coater, etc. It is coated uniformly onto a support made of a material such as aluminum foil and dried to form a phosphor layer. Furthermore, a protective film made of a transparent plastic thin film that can transmit light may be provided on the surface of the phosphor layer in order to protect the phosphor layer. , apply a solution prepared by dissolving a transparent polymer substance such as nitrocellulose, polymethyl methacrylate, polyvinyl butyral, vinyl chloride/vinyl acetate copolymer in an appropriate solvent and dry it to form a protective film, or polyethylene terephthalate,
A transparent thin film of polyethylene, polyamide, etc. is laminated on the surface of the phosphor layer to obtain the converter of the present invention.
本発明のコンバーターに用いられる6LiFは6L1の
含有率の高い市販の6LiF又は6シlの含有率のきわ
めて高い6L1□CO3,6LiN03等のリチウム塩
を水、酸等に溶解し、これにKF、HF等の水又は酸に
可溶性の含弗素化合物を加えて弗化物として沈殿させる
ことによってf4た6LiFが用いられる。本発明のコ
ンバーターに用いられる6LiFが5μmより小さいと
従来のコンバーターと同様、得られるコンバーターの感
度が十分に得られず、また20μmより大きいものを用
いるとコンバーターの感度はそれほど低下しないが鮮鋭
度が低下するため、好ましくなく、従って、本発明のコ
ンバータに使用される6いFの平径粒子径は感度並びに
鮮鋭度の点でその中央値が5μm〜20μmの範囲にあ
るのが好ましく、8μm〜15μmの範囲にあるのがよ
り好ましい。このような特定粒子径の6LiFを得るに
は既製の6LiFを篩、水ぶるい等によって分級しても
良いが6LiFを含む化合物から溶液反応により’Li
Fを合成する方法によれば反応溶液中の6しビイオンの
濃度、F−イオンの濃度、pH値、液温、含弗素化合物
の添加速度等の反応条件をコントロールすることによっ
て所望の粒子径を有する61Fを製造することが出来る
ので特に好ましい。The 6LiF used in the converter of the present invention is obtained by dissolving commercially available 6LiF with a high 6L1 content or lithium salts such as 6L1□CO3, 6LiN03, etc. with an extremely high 6Sil content in water, acid, etc., and then adding KF, f46LiF is used by adding a fluorine-containing compound soluble in water or acid such as HF to precipitate it as a fluoride. If the 6LiF used in the converter of the present invention is smaller than 5 μm, the resulting converter will not have sufficient sensitivity, as in conventional converters, and if it is larger than 20 μm, the sensitivity of the converter will not decrease significantly but the sharpness will deteriorate. Therefore, from the viewpoint of sensitivity and sharpness, it is preferable that the average particle diameter of 6F used in the converter of the present invention is in the range of 5 μm to 20 μm, and preferably 8 μm to 20 μm. More preferably, the thickness is in the range of 15 μm. In order to obtain 6LiF with such a specific particle size, ready-made 6LiF may be classified using a sieve, water sieve, etc.;
According to the method for synthesizing F, the desired particle size can be obtained by controlling reaction conditions such as the concentration of hexabiion, concentration of F- ion, pH value, liquid temperature, and addition rate of the fluorine-containing compound in the reaction solution. This is particularly preferable since it is possible to produce 61F having the following properties.
本発明のコンバーターの構成成分の1つである( Zn
l X 、 Cd)l )S : Ag螢光体は従来公
知ノ方法で製造されたものがそのまま使用され、付活剤
としてのAgの外にCβ、Br 、・1等のハロゲンや
A1等の共付活剤を含む螢光体も同様に用いられる。(
Zn+−X 、C(L )S ’Ag螢光体は螢光体母
体中のCdSの固溶量(X値)が変わるとその発光色が
変化し、従ってX値並びに本発明のコンバーターと組合
わせて用いられる光検出器の分光感度によってコンバー
タを含む撮影系の感度も変わり得るが、特に感度の点か
ら光検出器の種類によらずx=0の(Zn+−11、C
L )S ’Ag螢光体く即ち、ZnS : Ag )
が本発明のコンバーターとして特に推奨される。One of the components of the converter of the present invention (Zn
l Fluorophores containing co-activators may be used as well. (
The Zn + - The sensitivity of the imaging system including the converter may change depending on the spectral sensitivity of the photodetector used, but from the viewpoint of sensitivity, x = 0 (Zn+-11, C
L)S'Ag fluorophore, i.e. ZnS:Ag)
are particularly recommended as converters for the present invention.
また、本発明のコンバーターの感度は(Zlll−M、
CdX)S : Ag螢光体の平均粒子径及び、(Zn
、−M%Cdイ)S : Ag螢光体と6シIF との
平均粒子径の相対関係によっても変化し、感度の点で用
いられる( 2n+ −x 、Ccl+ )S :Ag
螢光体の平均粒子径は3μm乃至7μmの範囲にあり、
また6LiFのそれと同等以下のものを用いるのが特に
好ましい。すなわち銀付活硫化亜鉛・カドミウム系螢光
体の平均粒子径に対する6LiFの平均粒子径の比が1
以上であることが好ましい。Moreover, the sensitivity of the converter of the present invention is (Zllll-M,
CdX)S: Average particle diameter of Ag phosphor and (Zn
, -M%Cd) S:Ag It changes depending on the relative relationship between the average particle diameter of the phosphor and the 6-IF, and is used in terms of sensitivity (2n+ -x, Ccl+)S:Ag
The average particle diameter of the phosphor is in the range of 3 μm to 7 μm,
Furthermore, it is particularly preferable to use a material that is equal to or lower than that of 6LiF. That is, the ratio of the average particle diameter of 6LiF to the average particle diameter of the silver-activated zinc sulfide/cadmium phosphor is 1.
It is preferable that it is above.
更に本発明のコンバーターは螢光体層中の6LiFと(
Zn、 )l 、Cdx )S : Ag螢光体との混
合重量比によってもその感度は大きく変化し、夫々の粒
子径の大小によらず、両者の混合重量比(銀付活硫化亜
鉛・カドミウム系螢光体に対する6LiFの比)はほぼ
0.5乃至2.0となるようにするのが好ましく、感度
の点でより好ましくはこの比を0.6乃至1.3の範囲
とするのが特に好ましい。Furthermore, the converter of the present invention has 6LiF in the phosphor layer and (
Zn, )l, Cdx)S: The sensitivity changes greatly depending on the mixing weight ratio with Ag phosphor, and regardless of the size of each particle, the mixing weight ratio of both (silver-activated zinc sulfide/cadmium It is preferable that the ratio of 6LiF to the system phosphor is approximately 0.5 to 2.0, and from the viewpoint of sensitivity, it is more preferable that this ratio is in the range of 0.6 to 1.3. Particularly preferred.
本発明のコンバーターに用いられる結合剤としテハニト
ロセルロース、エチルセルロース、塩化ビニル・酢酸ビ
ニル共重合体、ポリ酢酸ビニノベポリビニルブチラール
、ポリメチルメタクリレート、アクリルポリオール、ポ
リウレタン、セルロールアセテート・ブチレート等のよ
うな通常層形成に用いられる結合剤が用いられる。Binders used in the converter of the present invention include nitrocellulose, ethylcellulose, vinyl chloride/vinyl acetate copolymer, polyvinyl acetate, polyvinyl butyral, polymethyl methacrylate, acrylic polyol, polyurethane, cellulose acetate/butyrate, etc. Binders commonly used for layer formation are used.
第1図は6LiFとznS:Ag螢光体から成るコンバ
ーターにおいて用いられる6LiFの粒子径と得られる
コンバーターの感度との相関関係について例示したもの
である。第1図において縦軸の相対感度は各コンバータ
ーにフィルムを密着させて一部フラッグス量の中性子を
一定時間照射した時のフィルムの黒化度を測定し、平均
粒子径が12μmの6LiFを用いたコンバーターの黒
化度を100とした時の相対値で示したものであり、こ
の時用いられたZnS : Ag螢光体の粒子径は一定
とした。FIG. 1 illustrates the correlation between the particle size of 6LiF used in a converter made of 6LiF and a znS:Ag phosphor and the sensitivity of the resulting converter. In Figure 1, the relative sensitivity on the vertical axis was determined by measuring the degree of blackening of the film when the film was placed in close contact with each converter and irradiated with neutrons of a partial flag amount for a certain period of time, and 6LiF with an average particle size of 12 μm was used. It is expressed as a relative value when the degree of blackening of the converter is set to 100, and the particle size of the ZnS:Ag phosphor used at this time was constant.
第1図から明らかなように粒子径がおよそ5μm乃至2
0μmの範囲にある時、最高感度の90%以上の感度を
有し、特に8μm乃至15μmの時より高感度であって
、いづれも平均粒子径3〜4μmの’LiFを用いた従
来のコンバーターよりも高感度のコンバーターが(尋ら
れる。As is clear from Figure 1, the particle diameter is approximately 5 μm to 2 μm.
It has a sensitivity of 90% or more of the maximum sensitivity when the particle size is in the range of 0 μm, and it is especially more sensitive than when the particle size is 8 μm to 15 μm, both of which are more sensitive than conventional converters using LiF with an average particle size of 3 to 4 μm. Even a highly sensitive converter (asked).
第2図および第3図はそれぞれ同じ(6LiFとZnS
: Ag螢光体から成るコンバーターにおいて用いら
れるZnS : Ag螢光体の平均粒子径と得られるコ
ンバーターの相対感度との関係を例示するグラフおよび
6LiFとlnS : Ag螢光体の混合重量比と得ら
れるコンバーターの相対感度との関係を例示するグラフ
であり、各グラフの縦軸の相対感度は第1図と同様にし
て求められている。Figures 2 and 3 are the same (6LiF and ZnS
A graph illustrating the relationship between the average particle diameter of the ZnS:Ag phosphor and the relative sensitivity of the resulting converter used in a converter consisting of a ZnS:Ag phosphor and the mixing weight ratio of 6LiF and lnS:Ag phosphor and the obtained 2 is a graph illustrating the relationship between the relative sensitivity of the converter and the relative sensitivity of the converter, and the relative sensitivity on the vertical axis of each graph is obtained in the same manner as in FIG. 1.
第2図から明らかなように61FとlnS : Ag螢
光体から成る本発明のコンバーターにおいては、用いら
れる6シ’i Fの粒子径を一定とした場合、これと共
に用いられるZnS :Ag螢光体はその平均粒径がお
よそ5μmをピークとしてこれより大でも、また小でも
感度の低下が見られ、3μm乃至7μmの範囲で最高感
度の90%以上の感度ををするコンバーターが得られる
。As is clear from FIG. 2, in the converter of the present invention composed of 61F and lnS:Ag fluorophores, when the particle diameter of 61F used is constant, the ZnS:Ag fluorescer used together with 61F and lnS:Ag fluorophores The average particle diameter of the converter peaks at about 5 μm, and the sensitivity decreases as the particle size becomes larger or smaller, and a converter with a sensitivity of 90% or more of the maximum sensitivity in the range of 3 μm to 7 μm can be obtained.
また、第3図から明らかなように、6シIF とZnS
: Ag螢光体の混合物からなるコンバーターは、6
LiFとZnS : Ag螢光体の重量に対する6LI
F重量の混合比がおよそIのとき(1/1のとき)感度
のピークを有し、この比がおよそ0.5乃至2.0 (
1/2乃至2/1)の範囲にあるとき、最高感度の80
%以上の感度を有する。Moreover, as is clear from Fig. 3, 6-IF and ZnS
: A converter consisting of a mixture of Ag fluorophores
LiF and ZnS: 6LI relative to the weight of Ag phosphor
The sensitivity peaks when the F weight mixing ratio is approximately I (1/1), and this ratio is approximately 0.5 to 2.0 (
1/2 to 2/1), the maximum sensitivity is 80
% or more.
なお、6LiFとZnS : Ag螢光体からなるコン
バーターにおいて’LiFの粒子径と得られるコンバー
ターの相対感度との関係は同時に用いられるZnS :
Ag螢光体の粒子径のいかんによらず大略第1図に例
示した関係と類似の関係にあり、また2nS : Ag
螢光体の粒子径と得られるコンバーターの相対感度との
関係は同じく同時に用いられる6LiFの粒子径のいか
んにかかわらず第2図に例示した関係と類似の関係にあ
ることが確認された。In addition, in a converter made of 6LiF and ZnS:Ag phosphor, the relationship between the particle size of LiF and the relative sensitivity of the resulting converter is as follows:
Regardless of the particle size of the Ag phosphor, the relationship is roughly similar to that illustrated in Figure 1, and 2nS: Ag
It was confirmed that the relationship between the particle size of the phosphor and the relative sensitivity of the resulting converter is similar to the relationship illustrated in FIG. 2, regardless of the particle size of 6LiF used at the same time.
また、6シIFと2nS : Ag螢光体との混合重量
比と得られるコンバーターの相対感度との関係も用いら
れる6LiF及びlnS : Ag螢光体の粒子径によ
らず第3図に例示した相関関係と類似で、はぼ両者の混
合重量比が1に近い時、最も高感度のコンバーターが得
られた。更に、例示していないがZnS : Ag以外
の(Znl K 、Cdx )S : Ag螢光体を用
いた場合も、得られるコンバーターの相対感度と61i
F又は(Zn14 、Cdx )S : Ag螢光体の
粒子径並びに6シlFと(Zn1−x 、Cd、、)S
: Ag螢光体との混合重量比との相関関係は大略第
1図〜第3図に例示した相関関係と類似の傾向を示した
。In addition, the relationship between the mixing weight ratio of 6LiF and 2nS:Ag phosphor and the relative sensitivity of the resulting converter is also used. Similar to the correlation, the most sensitive converter was obtained when the mixed weight ratio of both was close to 1. Furthermore, although not exemplified, when (Znl K , Cdx )S:Ag fluorophores other than ZnS:Ag are used, the relative sensitivity and 61i of the resulting converter
F or (Zn14, Cdx)S: Ag phosphor particle size and 6 silF and (Zn1-x, Cd,,)S
: The correlation with the mixing weight ratio with the Ag phosphor showed a tendency roughly similar to the correlation illustrated in FIGS. 1 to 3.
次に実施例により本発明を説明する。但し、これらの実
施例は本発明を制限するものではない。Next, the present invention will be explained with reference to examples. However, these Examples do not limit the present invention.
(実施例1)
6シ1を95原子%以上含有する炭酸リチウム(6t、
12CO,) 1重量部を1.5Nの塩酸(llc1
20重量部に溶解し水酸化アンモニウム(NH,OH)
でpH5に調整した後、これに弗化カリウム(KF)2
重量部を溶解した10%水溶液を室温で添加して6LI
Fを沈殿させ、濾過し、乾燥して6LiFを得た。得ら
れた6LiFは顕微鏡法によりその粒子径を測定したと
ころ平均粒子径は8μmであった。(Example 1) Lithium carbonate (6t,
12CO,) 1 part by weight was added to 1.5N hydrochloric acid (llc1
Ammonium hydroxide (NH,OH) dissolved in 20 parts by weight
After adjusting the pH to 5 with
6LI by adding a 10% aqueous solution in which parts by weight were dissolved at room temperature.
F was precipitated, filtered and dried to yield 6LiF. The particle size of the obtained 6LiF was measured by microscopy, and the average particle size was 8 μm.
このようにして製造された平均粒子径8μmの’LiF
5重量部と平均粒子径4μmのZnS : A、g螢
光体5重量部とニトロセルロース(結合剤)1重量部と
を溶剤(アセトン:酢酸エチルの混合重量比が1:9の
混合物)と共に混合し、粘度がおよそ100センチスト
ークスの螢光体塗布液を調製した。'LiF with an average particle size of 8 μm produced in this way
5 parts by weight of ZnS with an average particle size of 4 μm: 5 parts by weight of A,g phosphor and 1 part by weight of nitrocellulose (binder) were mixed with a solvent (a mixture of acetone and ethyl acetate in a weight ratio of 1:9). A phosphor coating solution having a viscosity of approximately 100 centistokes was prepared by mixing.
次いでこの螢光体塗布液を、表面にカーボンブラックの
光吸収層を有する厚さ150μmの紙の支持体上に乾燥
後の螢光体塗布重量がおよそ50mg / ctlとな
るようにナイフコーターを用いて均一に塗布し、乾燥し
て螢光体層を形成した。Next, this phosphor coating solution was applied onto a 150 μm thick paper support having a carbon black light absorption layer on the surface using a knife coater so that the phosphor coating weight after drying was approximately 50 mg/ctl. The phosphor layer was formed by applying the film uniformly and drying it.
次にこの螢光体層上に酢酸セルロースをアセトンに溶解
した塗布液を、乾燥後の膜厚がおよそ5μmとなるよう
に塗布し、乾燥させて保護膜を形成し、コンバーター〔
I〕を製造した。Next, a coating solution prepared by dissolving cellulose acetate in acetone is applied onto this phosphor layer so that the film thickness after drying is approximately 5 μm, and is dried to form a protective film.
I] was produced.
(実施例2)
弗化カリウム(KF)2重量部を溶解した10%水溶液
に替えて、同じく弗化カリウム(KF)2重量部を溶解
した6%水溶液を使用する以外は実施例1と同様にして
平均粒子径12μmの61iFを得た。(Example 2) Same as Example 1 except that instead of the 10% aqueous solution containing 2 parts by weight of potassium fluoride (KF), a 6% aqueous solution containing 2 parts by weight of potassium fluoride (KF) was used. 61iF with an average particle diameter of 12 μm was obtained.
次いで平均粒子径8μmの61iFに替えて上述のよう
にして得られた平均粒子径12μmの6シIFを用い、
更に平均粒子径4μmの2nS : Ag螢光体に代え
て平均粒子径5μmのZnS : Ag螢光体を用いか
つ、支持体上に、乾燥後の螢光体塗布重量が60mg/
cTIIとなるように螢光体塗布液を塗布する以外は実
施例1と同様にしてコンバーター[II]を製造した。Next, instead of 61iF with an average particle diameter of 8 μm, 6iIF with an average particle diameter of 12 μm obtained as described above was used,
Furthermore, a ZnS:Ag phosphor with an average particle size of 5 μm was used in place of the 2nS:Ag phosphor with an average particle size of 4 μm, and the coating weight of the phosphor after drying was 60 mg/day on the support.
Converter [II] was produced in the same manner as in Example 1, except that the phosphor coating liquid was applied so as to be cTII.
(実施例3)
弗化カリウム(KF)2重量部を溶解した10%水溶液
に替えて、同じく弗化カリウム(KF)2重量部を溶解
した8%水溶液を使用する以外は実施例1と同様にして
平均粒子径10μmの6LiFを得た。(Example 3) Same as Example 1 except that instead of the 10% aqueous solution containing 2 parts by weight of potassium fluoride (KF), an 8% aqueous solution containing 2 parts by weight of potassium fluoride (KF) was used. 6LiF having an average particle diameter of 10 μm was obtained.
次いで平均粒子径8μmの61iFに替えて上述のよう
にして得られた平均粒子径10μmの61iFを用い更
に、支持体上に、乾燥後の螢光体塗布重量が35mg/
cr+lとなるように螢光体塗布液を塗布する以外は実
施例1と同様にしてコンバーターClIDを製造した。Next, 61iF with an average particle diameter of 10 μm obtained as described above was used in place of 61iF with an average particle diameter of 8 μm, and the phosphor coating weight after drying was 35 mg/
A converter ClID was manufactured in the same manner as in Example 1, except that the phosphor coating liquid was applied so as to achieve cr+l.
このようにして得られたコンバーター〔I 〕、〔■〕
、〔■〕及び市販のコンバーター〔R〕(Nuclea
r Enterprises社製、NE−4266Li
Fの平均粒子径2〜3μm)のそれぞれについてフィル
ム(富士写真フィルム株式会社製FC)に密着させて、
これに小型サイクロトロンから発する中性子を照射し、
夫々の感度、鮮鋭度並びに粒状性を測定したところ下表
のような結果が得られ、コンバーターCII、〔■〕お
よび[、III)の感度、鮮鋭度及び粒状性共、従来の
コンバーターCR〕に比べて著しく優れていた。Converters [I], [■] obtained in this way
, [■] and a commercially available converter [R] (Nuclea
r Enterprises, NE-4266Li
F (average particle size 2 to 3 μm) was brought into close contact with a film (FC manufactured by Fuji Photo Film Co., Ltd.),
This is irradiated with neutrons emitted from a small cyclotron,
When we measured the sensitivity, sharpness, and graininess of each, we obtained the results shown in the table below, and found that the sensitivity, sharpness, and graininess of converters CII, [■], and [, III) were superior to that of the conventional converter CR]. It was significantly better than that.
また、これらのコンバーター〔ID、(II)、ClI
Dおよび〔R〕について夫々に上記のカドミウム箔より
なる矩形波テストチャートを被写体として小型サイクロ
トロンからの中性子を照射し、各コンバーター上に表わ
れたテストチャートの画像を撮像管によりディスプレイ
上に表示させたところコンバーター(I)、CITEお
よび〔■〕を介して現われた画像はコンバーター〔R〕
を介して現われた画像に比べて明るく、かつ解像度も優
れていた。In addition, these converters [ID, (II), ClI
For D and [R], the rectangular wave test chart made of cadmium foil described above was irradiated with neutrons from a small cyclotron as a subject, and the image of the test chart appearing on each converter was displayed on a display using an image pickup tube. However, images that appear via converter (I), CITE and [■] are converted to converter [R].
The image was brighter and had better resolution than the image that appeared via .
以上詳述したように’LiFと(2n、−X、 CcL
)S:Ag螢光体との混合物からなるコンバーターに
おいて、’LiF及び、(ln+−x 、Cdx )S
: Agの粒子径及び結合剤樹脂量を特定することに
よって従来のものに比べて特に感度並びに鮮鋭度の優れ
たコンバーターが得られ、中性子ラジオグラフィー等の
中性子による非破壊検査用として有用である。As detailed above, 'LiF and (2n, -X, CcL
)S: In a converter consisting of a mixture with Ag fluorophore, 'LiF and (ln+-x, Cdx)S
: By specifying the particle size of Ag and the amount of binder resin, a converter with particularly excellent sensitivity and sharpness compared to conventional ones can be obtained, and is useful for non-destructive testing using neutrons such as neutron radiography.
第1図は本発明のコンバーターの構成成分である6Li
Fの粒子径と得られるコンバーターの相対感度との関係
を例示するグラフである。
第2図は本発明のコンバーターの構成成分であるZnS
: Ag螢光体の粒子径と得られるコンバーターの相
対感度との関係を例示するグラフである。
第3図は本発明のコンバーターの構成成分である61F
(!:ZnS : Ag螢光体との混合型■比と1昇
られるコンバーターの相対感度との関係を例示するグラ
フである。Figure 1 shows 6Li, which is a component of the converter of the present invention.
2 is a graph illustrating the relationship between the particle diameter of F and the relative sensitivity of the resulting converter. Figure 2 shows ZnS, which is a component of the converter of the present invention.
: is a graph illustrating the relationship between the particle size of Ag phosphor and the relative sensitivity of the resulting converter. Figure 3 shows 61F, which is a component of the converter of the present invention.
(!: ZnS: This is a graph illustrating the relationship between the mixed type ratio with Ag phosphor and the relative sensitivity of the converter, which is increased by 1.
Claims (10)
を有し、該螢光体層が結合剤中に分散された^6LiF
と組成式が(Zn_1_−_x、Cd_x)S:Ag(
但し、xは0≦x≦0.6なる条件を満たす数である)
で表わされる銀付活硫化亜鉛・カドミウム系螢光体との
混合物から成り、前記^6LiFの平均粒子径が5μm
乃至20μmの範囲にあることを特徴とする中性子コン
バーター。(1) ^6LiF, which has a support and a phosphor layer provided on the support, and the phosphor layer is dispersed in a binder.
and the composition formula is (Zn_1_-_x, Cd_x)S:Ag(
However, x is a number that satisfies the condition 0≦x≦0.6)
It consists of a mixture with a silver-activated zinc sulfide/cadmium phosphor represented by
A neutron converter characterized in that it is in the range of 20 μm to 20 μm.
mの範囲にあることを特徴とする特許請求の範囲第1項
記載の中性子コンバーター。(2) The average particle diameter of the ^6LiF is 8 μm to 15 μm
2. A neutron converter according to claim 1, characterized in that the neutron converter is in the range of m.
特徴とする特許請求の範囲第1項乃至第2項記載の中性
子コンバーター。(3) The neutron converter according to any one of claims 1 to 2, wherein the x is a number that satisfies the condition that x=0.
粒子径が3μm乃至7μmの範囲にあることを特徴とす
る特許請求の範囲第1項乃至第3項のいづれか一項に記
載の中性子コンバーター。(4) The average particle diameter of the silver-activated zinc sulfide/cadmium-based phosphor is in the range of 3 μm to 7 μm. Neutron converter.
粒子径に対する前記^6LiFの平均粒子径の比が1以
上であることを特徴とする特許請求の範囲第1項乃至第
4項のいづれか一項に記載の中性子コンバーター。(5) Claims 1 to 4 characterized in that the ratio of the average particle diameter of the ^6LiF to the average particle diameter of the silver-activated zinc sulfide/cadmium-based phosphor is 1 or more. A neutron converter according to any one of the above.
に対する前記^6LiFの重量の比が0.5乃至2.0
の範囲にあることを特徴とする特許請求の範囲第1項乃
至第5項のいづれか一項に記載の中性子コンバーター。(6) The ratio of the weight of the ^6LiF to the weight of the silver-activated zinc sulfide/cadmium phosphor is 0.5 to 2.0.
A neutron converter according to any one of claims 1 to 5, characterized in that the neutron converter falls within the range of .
銀付活硫化亜鉛・カドミウム系螢光体との総重量の混合
比が5以上であることを特徴とする特許請求の範囲第1
項乃至第6項のいづれか一項に記載の中性子コンバータ
ー。(7) A mixing ratio of the total weight of the ^6LiF and the silver-activated zinc sulfide/cadmium-based phosphor to the weight of the binder is 5 or more.
The neutron converter according to any one of Items 6 to 6.
と接する側に光吸収層を有する紙支持体から成ることを
特徴とする特許請求の範囲第1項乃至第7項記載の中性
子コンバーター。(8) The neutron rays according to any one of claims 1 to 7, wherein the support is made of a paper support having a light absorption layer at least on the side of the support that is in contact with the phosphor layer. converter.
さ10μm以下の薄層から成る保護膜を有することを特
徴とする特許請求の範囲第1項乃至第8項のいづれか一
項に記載の中性子コンバーター。(9) Any one of claims 1 to 8, characterized in that a protective film consisting of a thin layer with a thickness of 10 μm or less is provided on the surface of the phosphor layer opposite to the support side. The neutron converter described in paragraph 1.
上含有する^6LiF_2CO_3を酸で溶解し、これ
に水又は酸に可溶性の含弗素化合物を添加して製造され
た^6LiFであることを特徴とする特許請求の範囲第
1項乃至第9項のいづれか一項に記載の中性子コンバー
ター。(10) The above ^6LiF is ^6LiF produced by dissolving ^6LiF_2CO_3 containing 95 at% or more of ^6LiF in acid, and adding a fluorine-containing compound soluble in water or acid to this. A neutron converter according to any one of claims 1 to 9.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12067686A JPS62277587A (en) | 1986-05-26 | 1986-05-26 | Neutron converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12067686A JPS62277587A (en) | 1986-05-26 | 1986-05-26 | Neutron converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62277587A true JPS62277587A (en) | 1987-12-02 |
Family
ID=14792181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12067686A Pending JPS62277587A (en) | 1986-05-26 | 1986-05-26 | Neutron converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62277587A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001502051A (en) * | 1996-09-20 | 2001-02-13 | ミッション サポート インコーポレイテッド | Low energy neutron detector based on lithium lanthanide borate scintillator |
JP2004309169A (en) * | 2003-04-02 | 2004-11-04 | Canon Inc | Radiographic equipment |
JP2007070496A (en) * | 2005-09-07 | 2007-03-22 | Japan Atomic Energy Agency | NEUTRON-DETECTING SCINTILLATOR AND PARTICLE RADIATION-DETECTING SCINTILLATOR BY USING ZnS PHOSPHOR |
WO2014092202A1 (en) * | 2012-12-12 | 2014-06-19 | 株式会社トクヤマ | Neutron scintillator, neutron detection method, and neutron detector |
JP2017510804A (en) * | 2014-03-27 | 2017-04-13 | クロメック リミテッドKromek Limited | Neutron detection |
-
1986
- 1986-05-26 JP JP12067686A patent/JPS62277587A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001502051A (en) * | 1996-09-20 | 2001-02-13 | ミッション サポート インコーポレイテッド | Low energy neutron detector based on lithium lanthanide borate scintillator |
JP2004309169A (en) * | 2003-04-02 | 2004-11-04 | Canon Inc | Radiographic equipment |
JP2007070496A (en) * | 2005-09-07 | 2007-03-22 | Japan Atomic Energy Agency | NEUTRON-DETECTING SCINTILLATOR AND PARTICLE RADIATION-DETECTING SCINTILLATOR BY USING ZnS PHOSPHOR |
WO2014092202A1 (en) * | 2012-12-12 | 2014-06-19 | 株式会社トクヤマ | Neutron scintillator, neutron detection method, and neutron detector |
JPWO2014092202A1 (en) * | 2012-12-12 | 2017-01-12 | 株式会社トクヤマ | Neutron scintillator, neutron detection method and neutron detector |
US9567517B2 (en) | 2012-12-12 | 2017-02-14 | Tokuyama Corporation | Neutron scintillator, neutron detection method and neutron detector |
JP2017510804A (en) * | 2014-03-27 | 2017-04-13 | クロメック リミテッドKromek Limited | Neutron detection |
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