The electron paramagnetic resonance spectrum of gamma-irradiated dimethyl malonic acid

Asik B., Birey M.

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, cilt.59, sa.1-2, ss.103-104, 2004 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 59 Sayı: 1-2
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1515/zna-2004-1-216
  • Dergi Adı: ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.103-104
  • Anahtar Kelimeler: spectroscopic splitting factor, g, isotropic hyperfine coupling constant a, spin density p
  • Ankara Üniversitesi Adresli: Hayır

Özet

The electron paramagnetic resonance of gamma-Irradiated single crystals of dimethyl malonic acid [(CH3)(2)C(COOH)(2)(.)] has been studied for different orientations of the crystal in a magnetic field. The radicals produced by gamma irradiation have been investigated between 123 and 300 K. The spectra were found to be temperature independent, and radiation damage centres were attributed to [(CH3)(2)C(COOH)(2)]+ radicals. The g factor and hyperfine coupling constants were found to be almost isotropic with average values g = 2.0036, b) a((COOH)2) = 0.5 MT, a((CH3)2) = 2.1 mT, respectively, and spin density rho = 91% of the [(CH3)(2)C(COOH)(2)](+) radical.