GB824789A - Improvements in or relating to methods of and means for radioactivation analysis - Google Patents

Improvements in or relating to methods of and means for radioactivation analysis

Info

Publication number
GB824789A
GB824789A GB145857A GB145857A GB824789A GB 824789 A GB824789 A GB 824789A GB 145857 A GB145857 A GB 145857A GB 145857 A GB145857 A GB 145857A GB 824789 A GB824789 A GB 824789A
Authority
GB
United Kingdom
Prior art keywords
kicksorter
trace element
spectrum
bias
irradiated
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
GB145857A
Inventor
John Laban Putman
William Henry Taylor
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 by UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB145857A priority Critical patent/GB824789A/en
Publication of GB824789A publication Critical patent/GB824789A/en
Expired legal-status Critical Current

Links

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]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/07—Investigating materials by wave or particle radiation secondary emission
    • G01N2223/074—Investigating materials by wave or particle radiation secondary emission activation analysis
    • G01N2223/0745—Investigating materials by wave or particle radiation secondary emission activation analysis neutron-gamma activation analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/50—Detectors
    • G01N2223/505—Detectors scintillation
    • G01N2223/5055—Detectors scintillation scintillation crystal coupled to PMT

Abstract

824,789. Radioactive analysis. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Jan. 15,1958 [Jan. 15, 1957], No. 1458/57. Class 40 (3). The concentration of a trace element in a base material is determined by subtracting the electrical outputs corresponding to the gammaray spectrum produced by two irradiated samples of the material, one of which contains the trace element. In the Figure the two matched thallium activated sodium iodide crystals 3 and 4 are exposed to the samples 5 and 6 respectively which have been previously irradiated by a neutron source, associated similar photo-multiplier tubes 1 and 2 detect the scintillations produced. By means of switch 8, operated at ¢-second intervals in conjunction with switch 11 the output of each photomultiplier is passed in turn through an amplifier 9 to the kicksorter 13 the bias of which is controlled by the recorder 10. The kicksorter output is applied via switch 11 to the ratemeter 12 in which the outputs corresponding to the pulse rate of each source at the energy level corresponding to the kicksorter bias setting are subtracted, the resulting signal being recorded at 10. The kicksorter bias is varied over a range corresponding to the energy range required, hence the recorder indicates the difference in the two gamma-ray spectra and isolates the spectrum of the trace element. The concentration is measured by comparison with the spectrum of a known amount of irradiated trace element.
GB145857A 1957-01-15 1957-01-15 Improvements in or relating to methods of and means for radioactivation analysis Expired GB824789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB145857A GB824789A (en) 1957-01-15 1957-01-15 Improvements in or relating to methods of and means for radioactivation analysis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB145857A GB824789A (en) 1957-01-15 1957-01-15 Improvements in or relating to methods of and means for radioactivation analysis

Publications (1)

Publication Number Publication Date
GB824789A true GB824789A (en) 1959-12-02

Family

ID=9722324

Family Applications (1)

Application Number Title Priority Date Filing Date
GB145857A Expired GB824789A (en) 1957-01-15 1957-01-15 Improvements in or relating to methods of and means for radioactivation analysis

Country Status (1)

Country Link
GB (1) GB824789A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2409271A (en) * 2000-08-03 2005-06-22 Cambridge Imaging Ltd X-ray inspection and material discrimination

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2409271A (en) * 2000-08-03 2005-06-22 Cambridge Imaging Ltd X-ray inspection and material discrimination
GB2409271B (en) * 2000-08-03 2005-09-21 Cambridge Imaging Ltd Improvements in and relating to material identification using x-rays

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