GB1016906A - Improvements in or relating to the measurement of the quantity of silver in photographic films - Google Patents

Improvements in or relating to the measurement of the quantity of silver in photographic films

Info

Publication number
GB1016906A
GB1016906A GB2004962A GB2004962A GB1016906A GB 1016906 A GB1016906 A GB 1016906A GB 2004962 A GB2004962 A GB 2004962A GB 2004962 A GB2004962 A GB 2004962A GB 1016906 A GB1016906 A GB 1016906A
Authority
GB
United Kingdom
Prior art keywords
film
filter
radiation
rays
silver
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
GB2004962A
Inventor
John Rathbone Rhodes
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 GB2004962A priority Critical patent/GB1016906A/en
Publication of GB1016906A publication Critical patent/GB1016906A/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
    • G01N23/223—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 irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
    • 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
    • G01N2223/076—X-ray fluorescence

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)
  • Measurement Of Radiation (AREA)

Abstract

1,016,906. X-ray determination of silver content of photographic film. UNITED KINGDOM ATOMIC ENERGY AUTHORITY, LONDON. May 16,1963 [May 24,1962], No. 20049/62. Heading G1A. The silver content of a photographic film 3 is determined by exposing the film to exciting radia- tion from a low energy bremsstrahlung source 1 and measuring the intensity of the characteristic K X-rays from the silver through a differential filter arrangement consisting of two separate filters 6R and 6M, one of which is effectively transparent to the said characteristic K X-rays whilst the other is opaque. The use of two such filters enables the apparatus to discriminate against undesirable background X-radiation. In the arrangement shown a moving film 3 passing over lead "irises" 9 is irradiated by two bremsstrahlung sources 1 such as Promethium 147/Aluminium in gold holders 7 through source filters 8 of antimony powder which attenuate low energy X-rays from the sources and provide a peak in the X-ray spectrum at 26. 4 keV, this peak intensity and the time of exposure of the film being such that fogging will not occur. Fluorescent X-radiation from the film passes through a rhodium filter 6(R) in one of the detector units shown and through a molybdenum filter 6(M) in the other to radiation detectors 2R and 2M respectively, the emergent radiation being detected by scintillation counters 2(R) and 2(M) respectively each having a sodium iodide crystal 4 with a beryllium window 5. The silver content of the film 3 is determined by subtracting the count rate obtained from the counter 2(M) from that from the counter 2(R) by means of a subtraction circuit 10 feeding a meter. The output from the circuit 10 may alternatively be used to control a machine in which the film is being coated. In a further embodiment a single detector unit is used (Fig. 1 not shown) to investigate a stationary film, two measurements being taken one with a molybdenum filter and the other with a rhodium filter.
GB2004962A 1962-05-24 1962-05-24 Improvements in or relating to the measurement of the quantity of silver in photographic films Expired GB1016906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2004962A GB1016906A (en) 1962-05-24 1962-05-24 Improvements in or relating to the measurement of the quantity of silver in photographic films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2004962A GB1016906A (en) 1962-05-24 1962-05-24 Improvements in or relating to the measurement of the quantity of silver in photographic films

Publications (1)

Publication Number Publication Date
GB1016906A true GB1016906A (en) 1966-01-12

Family

ID=10139516

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2004962A Expired GB1016906A (en) 1962-05-24 1962-05-24 Improvements in or relating to the measurement of the quantity of silver in photographic films

Country Status (1)

Country Link
GB (1) GB1016906A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2231977A1 (en) * 1973-06-04 1974-12-27 Texas Nuclear Corp
GB2196113A (en) * 1986-09-12 1988-04-20 Nat Res Dev Ore analysis

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2231977A1 (en) * 1973-06-04 1974-12-27 Texas Nuclear Corp
GB2196113A (en) * 1986-09-12 1988-04-20 Nat Res Dev Ore analysis
GB2196113B (en) * 1986-09-12 1990-12-12 Nat Res Dev Ore analysis
US5020084A (en) * 1986-09-12 1991-05-28 National Research Development Corporation Ore analysis

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