Bromine nuclear quadrupole resonance in zinc bromide and in lead bromide

Abstract

Nuclear quadrupole resonances of ⁷⁹Br and ⁸¹Br have been observed in both ZnBr₂ and PbBr₂ at 77, 195 and 298 K. For ZnBr₂ three closely spaced lines at 81.425, 83.100 and 84.137 MHz (⁸¹Br, 77 K) of relative intensities 1 : 2 : 1 are in accord with three non-equivalent lattice sites of space group I4₁/acd. For PbBr₂ two lines observed at 20.669 and 27.824 MHz (⁸¹Br, 77 K), consistent with space group P bnm, have been assigned to their respective lattice sites on the basis of point-charge model calculations.