GB1305573A - - Google Patents

Info

Publication number
GB1305573A
GB1305573A GB4703870A GB4703870A GB1305573A GB 1305573 A GB1305573 A GB 1305573A GB 4703870 A GB4703870 A GB 4703870A GB 4703870 A GB4703870 A GB 4703870A GB 1305573 A GB1305573 A GB 1305573A
Authority
GB
United Kingdom
Prior art keywords
melt
neutrons
detector
target
irradiation
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.)
Expired
Application number
GB4703870A
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1305573A publication Critical patent/GB1305573A/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
    • G01N23/221—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by activation analysis
    • G01N23/222—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material by activation analysis using neutron activation analysis [NAA]

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

1305573 Chemical analysis by radiation activation OSTERREICHISCHE STUDIENGESELLSCHAFT FœR ATOMENERGIE GmbH 2 Oct 1970 [2 Oct 1969] 47038/70 Heading G1A [Also in Division G6] The carbon content of an iron or steel melt 2 in a converter 1 is measured by irradiating the melt intermittently with fast or intermediate energy neutrons and in the intervals between the periods of irradiation, detecting the gammaradiation of isotope B<SP>12</SP> formed by the neutron irradiation of C<SP>12</SP> in the melt, the duration of the periods of irradiation and the intervals between, approximately equal and in the range 1 to 100 milliseconds. Typical energies for the neutrons are between 12 and 25 MeV and preferably 14 MeV. Apparatus, Fig. 3. A linear accelerator 6 shoots a stream of deuterons onto an exchangeable tritium target 4 to produce neutrons by a H 3 (d, n) He<SP>4</SP> reaction. The target 4 is within a neutron collimator 3 comprising a spherical water container, which absorbs both thermal neutrons, owing to boron added to the water, and the weak alpha particles produced. Neutrons issue via bore 7 towards melt 2. The oxygen lance is shown at 11. The detector of y-rays is mounted at 10 and may be a semi-conductor e.g. Ge(Li), or scintillation detector. In another arrangement, Fig. 4 (not shown), the accelerator (6) is outside the converter and sends deuterons along a tube (12) whose end containing the target (4) and detector (10) is immersed in the melt. The detector is shielded from the target by Li<SP>6</SP>, H 2 O, pariffin or graphite. The detector output can be used for measurement by a multi-channel pulse analyser or used for controlling the oxygen blowing.
GB4703870A 1969-10-02 1970-10-02 Expired GB1305573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT931469A AT295198B (en) 1969-10-02 1969-10-02 Method and device for determining the C content in chemical processes

Publications (1)

Publication Number Publication Date
GB1305573A true GB1305573A (en) 1973-02-07

Family

ID=3613079

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4703870A Expired GB1305573A (en) 1969-10-02 1970-10-02

Country Status (5)

Country Link
US (1) US3812364A (en)
AT (1) AT295198B (en)
DE (1) DE2044373A1 (en)
FR (1) FR2064898A5 (en)
GB (1) GB1305573A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3975643A (en) * 1974-01-23 1976-08-17 Westinghouse Air Brake Company Fail-safe opto-electronic phase inverting circuits
FR2588085B1 (en) * 1985-10-02 1987-10-30 Commissariat Energie Atomique FISSILE MATERIAL DETECTION DEVICE
FR2588969B1 (en) * 1985-10-18 1988-02-26 Commissariat Energie Atomique DEVICE FOR DETECTION OF EXPLOSIVE EXAMPLES
FR2641867B1 (en) * 1989-01-13 1991-03-08 Commissariat Energie Atomique METHOD AND DEVICE FOR DETECTION OF SUBSTANCES AND PARTICULARLY EXPLOSIVES, BY NEUTRONIC IRRADIATION THEREOF
FR2652651B1 (en) * 1989-10-03 1991-12-13 Commissariat Energie Atomique SYSTEM FOR DETECTION OF SUBSTANCES AND IN PARTICULAR EXPLOSIVES, BY NEUTRONIC IRRADIATION THEREOF.
AUPM616794A0 (en) * 1994-06-09 1994-07-07 Commonwealth Scientific And Industrial Research Organisation Determination of pre-reduction degree in iron ore materials
US5781602A (en) * 1996-05-17 1998-07-14 Westinghouse Electric Corporation PGNAA system for non-invasively inspecting RPV weld metal in situ, to determine the presence and amount of trace embrittlement-enhancing element
US20030165212A1 (en) * 1998-02-18 2003-09-04 Maglich Bogdan C. Method and apparatus for detecting, locating, and analyzing chemical compounds using subatomic particle activation
US6388260B1 (en) * 2000-03-06 2002-05-14 Sandia Corporation Solid state neutron detector and method for use
WO2005088245A1 (en) * 2004-03-11 2005-09-22 Hienergy Technologies, Inc. Method and apparatus for measuring wall thickness of a vessel

Also Published As

Publication number Publication date
AT295198B (en) 1971-12-27
DE2044373A1 (en) 1971-04-15
US3812364A (en) 1974-05-21
FR2064898A5 (en) 1971-07-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees