CONDUCTIVITY OF PHOTOGRAPHIC EMULSIONS
The connection between the photochemical sensitivity and the photoconductivity was examined for several types of photographic emulsions. The ratio of conductivity in dark to conductivity upon illumination was found to be 6 for Foma (17/10 DIN), 2.3 for Dia U Foma (3 deg Sch.), 3 for Ausensitized nuclear emulsion, 0.86 for unsensitized nuclear emulsion, and 0.47 for single AgCl crystals. The higher conductivity ratios were found to correspond with high sensitivities, and the result is explained in this way: Sensitive materials contain high concentrations of deep trapping centers which trap the free photoelectrons and neutralize interstitial Ag/sup +/ ions, thus decreasing the conductivity upon being illuminated. (D.L.C.)
- Research Organization:
- Nuclear Research Inst., Prague
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-029539
- OSTI ID:
- 4790635
- Journal Information:
- Nature, Journal Name: Nature Vol. Vol: 195
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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