| 摘要 |
The invention provides a radiation sensitive emulsion comprised of a dispersing medium and silver iodochloride grainsWHEREIN the silver iodochloride grainsare partially bounded by {100} crystal faces satisfying the relative orientation and spacing of cubic grains andcontain from 0.05 to 1 mole percent iodide, based on total silver, with maximum iodide concentrations located nearer the surface of the grains than their centerand wherein said emulsion further comprises a thiosulfonate of Formula I and a sulfinate of Formula IIwherein Formula I iswhereinZ1 is alkyl, aryl, heteroaryl, arylalkyl, substituted aryl or a polymeric backbone wherein the thiosulfonate group is repeated andM1 is a monovalent metal or a tetraalkylammonium cation, andFormula II iswhereinZ2 is alkyl, aryl, heteroaryl, arylalkyl, substituted aryl or a polymeric backbone wherein the sulfinate group is repeated andM2 is a monovalent metal or a tetraalkylammonium cation.
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