Enhancement of Radiation Sensitivity on Silver-Salt Photographic Materials by Post-Exposure Latensification with Red Light at Low Temperature

DOI
  • Kuge Ken'ichi
    Graduate School of Advanced Integration Science, Chiba University
  • Miyazato Naohiro
    Graduate School of Advanced Integration Science, Chiba University
  • Yasuda Nakahiro
    Research, Development and Support Center, National Institute of Radiological Sciences
  • Kodaira Satoshi
    Research, Development and Support Center, National Institute of Radiological Sciences
  • Kumagai Hiroshi
    Radioisotope Center, Chiba University

Bibliographic Information

Other Title
  • 低温赤色光後露光補力による銀塩感光材料での放射線感度の向上

Abstract

During the radiation exposures to silver-salt photographic materials, small and undevelopable latent sub-image specks (LSIS) are often formed at several sites, and so the dispersion of photolytic silver clusters reduces the sensitivity. We examined the effect of post-exposure latensification with red light at low temperature, in which LSIS was reconstituted to increase the sensitivity. The grain density (GD) of the tracks increased when the photographic film irradiated with heavy-ion beam was exposed with red light at -30°C. This effect is thought to be similar to the Herschel effect. When LSIS absorbs red light and so an electron in silver atom is excited to conduction band of silver halide, another LSIS captures the electron to grow into a developable latent image speck. The exposure at low temperature inhibits the red-light sensitivity of chemical-sensitization centers. The large effect was obtained in cases that the GD was small, such as photographic plates were exposed with ion beam of less energy-loss or developed with weak developer.<br>

Journal

Keywords

Details 詳細情報について

  • CRID
    1390001206570616576
  • NII Article ID
    130004567208
  • DOI
    10.11454/photogrst.75.408
  • COI
    1:CAS:528:DC%2BC3sXhsFehtrw%3D
  • ISSN
    18845932
    03695662
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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