Gamma-Irradiated Calcium Succinate Monohydrate Single Crystal Investigation with EPR Technique

Abstract

In this study, EPR investigation of gamma-irradiated calcium succinate monohydrate [CaC <inf>4</inf>H <inf>4</inf>O <inf>4</inf>·H <inf>2</inf>O] single crystal has been carried out at room temperature. The compound crystallizes in monoclinic symmetry with the unit-cell dimensions: a = 11.952(2) , b = 9.691(2) , c = 11.606(2) , β = 108.81(1)°. The observed lines in the EPR spectra reveal the formation of ĊH <inf>α</inf>CH <inf>β1</inf>H <inf>β2</inf> radical after irradiating [CaC <inf>4</inf>H <inf>4</inf>O <inf>4</inf>·H <inf>2</inf>O] single crystal. The angular variations of EPR spectra have shown that the radical type has only one site in three perpendicular planes. The principal g and a values and direction cosines of ĊH <inf>α</inf>CH <inf>β1</inf>H <inf>β2</inf> radical have been determined. © 2011 Elsevier B.V.