RESPONSE OF PHOTOGRAPHIC EMULSIONS TO THERMAL AND EPITHERMAL NEUTRONS
Technical Report
·
OSTI ID:4075032
The amount of activation by thermal and epithermal neutrons of silver in a photographic emulsion was calculated in terms of thermal neutron flux and cadinium ratio as determined by gold foils 1.27-cm diameter by 0.0297-cm thick. The dose-rate distributions around point sources of Ag/sup 108/ and Ag/sup 110/ were calculated and used to determine the dose to a phetographic emulsion resulting from activation of its own silver by thermal and epithermal neutrons. It was found that the dose to an emulsion from thermal neutrons only could be expressed as D(th) = 0.46 x 10/sup -10/(nvt) - bar t/sub Ag/ >i rads, where (nvt) - bar is the average thermal neutron flux in neutrons/ cm/sup 2/ and t/sub Ag/ is the silver contert of the emulsion in mgm/ cm/sup 2/. The ratio of the total dose to an emulsion from both thermal and epithermal neutrons to the dose caused by thermal neutrons only was obtained as a function of cadmium ratio. (auth)
- Research Organization:
- Naval Radiological Defense Lab., San Francisco
- NSA Number:
- NSA-15-012046
- OSTI ID:
- 4075032
- Report Number(s):
- USNRDL-TR-493
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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