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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 57, Iss. 4 — Apr. 1, 1967
  • pp: 508–512

Low-Intensity Reciprocity Failure of a AgBr Emulsion: Effect of Halogen Acceptors

H. E. SPENCER and D. H. SHARES  »View Author Affiliations


JOSA, Vol. 57, Issue 4, pp. 508-512 (1967)
http://dx.doi.org/10.1364/JOSA.57.000508


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Abstract

Low-intensity reciprocity failure (LIRF) of a silver bromide emulsion was drastically reduced, but not eliminated, by the addition of a halogen acceptor, such as acetone semicarbazone, before coating. The remaining failure has a slope of approximately minus unity on an isodensity plot of log intensity vs log intensity × time. This is interpreted as exemplifying two types of LIRF, an intergranular type stopped by a sufficient amount of halogen acceptor, and an intragranular type caused by the thermal instability of a photolytically produced silver atom. A LIRF curve was also obtained in terms of the number of absorbed photons necessary to make a grain developable. These data suggest that considerable recombination occurs before nucleation of the latent image. The quantum efficiency of formation of print-out silver is 0.2 silver atom per absorbed photon. This value indicates that growth of the latent image after nucleation is efficient.

Citation
H. E. SPENCER and D. H. SHARES, "Low-Intensity Reciprocity Failure of a AgBr Emulsion: Effect of Halogen Acceptors," J. Opt. Soc. Am. 57, 508-512 (1967)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-57-4-508

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