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

POLAT M., Korkmaz M.

RADIATION PHYSICS AND CHEMISTRY, cilt.78, sa.11, ss.966-970, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 78 Sayı: 11
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.radphyschem.2009.06.032
  • Dergi Adı: RADIATION PHYSICS AND CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.966-970
  • Hacettepe Üniversitesi Adresli: Evet

Özet

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.