EPR study of radiation damage in gamma-irradiated 3-nitroacetophenone single crystal

ÇALIŞKAN B., Caliskan A. C.

Radiation Effects and Defects in Solids, cilt.172, sa.5-6, ss.398-410, 2017 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 172 Sayı: 5-6
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1080/10420150.2017.1320800
  • Dergi Adı: Radiation Effects and Defects in Solids
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.398-410
  • Anahtar Kelimeler: 3-nitroacetophenone, Electron paramagnetic resonance, hyperfine coupling constant, radiation damage center, spectroscopic splitting factor
  • Ankara Üniversitesi Adresli: Evet

Özet

This paper presents the results of the electron paramagnetic resonance (EPR) study of the anion radical formed from 3-nitroacetophenone (C8H7NO3) (3NAP) single crystal, by gamma irradiation. The EPR spectra of gamma-irradiated single crystals of 3NAP have been recorded at 10-degree intervals for different orientations of crystals in a magnetic field, at room temperature. The EPR analysis of gamma-irradiated crystals of 3NAP has shown that the radiation damage center produced by gamma irradiation is the carbon-centered 3NAP anion radical. One-electron reduction of 3NAP results in general bond loosening. The single crystals have been investigated between 120 and 450 K. The spectra have been found to be temperature-dependent. The EPR parameters of the 3NAP anion radical have been evaluated.