Europium-151 Mössbauer spectroscopic studies of europic oxide

Abstract

Mossbauer spectra of europic oxide show a single absorption peak which is both broad and asymmetric as a result of unresolved quadrupole splitting. Attempts to fit such spectra to a single Lorentzian peak have been found to be unsatisfactory. A more satisfactory analysis has been obtained by taking quadrupole splitting into account. The effects of prior heat treatment of europic oxide on the Mossbauer spectra have been investigated, and it is concluded that observed variations in isomer shift are not attributable to the cubic-monoclinic phase transition.IN the course of a study of the isomer shift of europic similar magnitude have been reported by Gerth et aZ.2 oxide with respect to europic fluoride it was observed for the isomer shift at room temperature of cubic that the isomer shift varied from sample to sample by europic oxide relative to monoclinic europic oxide. as much as 0-2 mm s-l, the largest deviation from the Deeney et aL3 observed a variation of 0-25 mm s-l in average value occurring with an Eu,O, sample isotopically enriched in 151Eu (99.15% 151Eu).

Synthesis, characterization of an AlPO-CJ2analogue containing heteroatomic Eu

“…of Eu 2 O 3 is at 0.88(1) mm s 21 (cubic) or 1.09 mm s 21 (monoclinic), the possibility of a Eu 2 O 3 phase existing in sample S Eu is ruled out completely. 11 The 31 P MAS NMR spectrum of sample S Eu is shown in Fig. 3 in which two strong peaks occur at 221.2 and 210.2 ppm, almost at the same positions as those of AlPO-CJ 2 .…”