The effects of temperature on ESR spectrum of gamma-irradiated ammonium tartrate


POLAT M. , Korkmaz M.

RADIATION PHYSICS AND CHEMISTRY, vol.78, no.11, pp.966-970, 2009 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 78 Issue: 11
  • Publication Date: 2009
  • Doi Number: 10.1016/j.radphyschem.2009.06.032
  • Title of Journal : RADIATION PHYSICS AND CHEMISTRY
  • Page Numbers: pp.966-970

Abstract

Unirradiated ammonium tartrate (AT) samples do not exhibit any ESR signal. However, irradiation produces an unresolved singlet at g = 2.0034 +/- 0.0006 with two shoulders at g(1) = 2.0093 +/- 0.0006 and g(2) = 2.0048 +/- 0.0006. The dose-response curve was found to increase linearly with the applied radiation doses in the range of 0.1-2.0 kGy and the slope of this curve was increased as the modulation amplitude increased. The activation energy value E(a) = 69.0 +/- 1.2 kJ/mol was calculated from Arrhenius plot for the radical species responsible from ESR spectrum of irradiated AT. (C) 2009 Elsevier Ltd. All rights reserved.