GB1114416A - Improvements relating to the determination of oxygen distribution - Google Patents

Improvements relating to the determination of oxygen distribution

Info

Publication number
GB1114416A
GB1114416A GB2880364A GB2880364A GB1114416A GB 1114416 A GB1114416 A GB 1114416A GB 2880364 A GB2880364 A GB 2880364A GB 2880364 A GB2880364 A GB 2880364A GB 1114416 A GB1114416 A GB 1114416A
Authority
GB
United Kingdom
Prior art keywords
piece
test
gamma radiation
oxygen
oxygen distribution
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
GB2880364A
Inventor
Arnold Metcalf
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.)
Plessey UK Ltd
Original Assignee
Plessey UK Ltd
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 Plessey UK Ltd filed Critical Plessey UK Ltd
Priority to GB2880364A priority Critical patent/GB1114416A/en
Publication of GB1114416A publication Critical patent/GB1114416A/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
    • G01N2223/40—Imaging
    • G01N2223/406—Imaging fluoroscopic image
    • 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
    • G01N2223/60—Specific applications or type of materials
    • G01N2223/624—Specific applications or type of materials steel, castings
    • 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
    • G01N2223/60—Specific applications or type of materials
    • G01N2223/646—Specific applications or type of materials flaws, defects

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

1,114,416. Radiographic examination of material via neutron irradiation. PLESSEYU.K. Ltd. 16 July, 1965 [13 July, 1964], No. 28803/64. Heading H5K. [Also in Division G1] Oxygen distribution in material is determined by activation of the oxygen content by bombardment with high energy neutrons to produce a radioactive isotope of nitrogen. The high energy gamma radiation resulting from the activation during the period when the radioactive isotope decays back to stable oxygen is detected and a viewable light pattern is produced indicative of the oxygen distribution in the material, in dependence upon and contemporaneously with such detection. A steel test-piece 1 is subjected to high energy neutrons emitted from a neutron generator within a shielded enclosure 3. The activated test-piece 1 is then positioned adjacent a metal strip 4 which receives gamma radiation and emits electrons. The emitted electrons impinge on an electron sensitive phosphor 5 to produce a light pattern corresponding to oxygen distribution in the test-piece 1. The phosphor 5 is coupled to an image intensifier 6 and the magnified image is viewed on a fluorescent screen 7. Alternatively the image may be viewed with binoculars or a binocular microscope. If the test-piece is relatively thin, an improved image representation may be obtained using two gamma radiation detectors arranged one on each side of the test-piece and by superimposing the two determinations. Alternatively, the gamma radiation may be sensed directly by a screened gamma-sensitive phosphor or by a bundle of phosphors, to produce a light pattern corresponding to the oxygen distribution. When it is also required to obtain an assessment of the total oxygen content, then an aggregate number of impulses derived from detecting equipment comprising a multiplicity of fibre phosphors and representing the total oxygen content may be recorded. Improved sensitivity may be obtained by use of a large gammasensitive scintillator (instead of strip 4 and material 5) optically coupled to a multiplier phototube.
GB2880364A 1964-07-13 1964-07-13 Improvements relating to the determination of oxygen distribution Expired GB1114416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2880364A GB1114416A (en) 1964-07-13 1964-07-13 Improvements relating to the determination of oxygen distribution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2880364A GB1114416A (en) 1964-07-13 1964-07-13 Improvements relating to the determination of oxygen distribution

Publications (1)

Publication Number Publication Date
GB1114416A true GB1114416A (en) 1968-05-22

Family

ID=10281433

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2880364A Expired GB1114416A (en) 1964-07-13 1964-07-13 Improvements relating to the determination of oxygen distribution

Country Status (1)

Country Link
GB (1) GB1114416A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109154578A (en) * 2016-05-17 2019-01-04 西屋电气有限责任公司 Instantaneous gamma emission measuring system for surface defects detection and the generation pulsed neutron of analysis

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109154578A (en) * 2016-05-17 2019-01-04 西屋电气有限责任公司 Instantaneous gamma emission measuring system for surface defects detection and the generation pulsed neutron of analysis
EP3458847A4 (en) * 2016-05-17 2020-02-26 Westinghouse Electric Company Llc Pulsed neutron generated prompt gamma emission measurement system for surface defect detection and analysis
CN113624795A (en) * 2016-05-17 2021-11-09 西屋电气有限责任公司 Transient gamma emission measurement system for generating pulsed neutrons for surface defect detection and analysis
CN113624795B (en) * 2016-05-17 2024-03-08 西屋电气有限责任公司 Pulsed neutron-generating transient gamma emission measurement system for surface defect detection and analysis

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