Line Width of the Pure Quadrupole Resonance of Bromine in NaBrO₃

Abstract

Using a regenerative spectrometer the line widths of the two bromine isotopes in NaBrO₃ were measured at melting ice and liquid oxygen temperatures. The full width at half-maximum intensity of Br⁷⁹ is 3.85±0.1 kc and that of Br⁸¹ is 4.09±1 kc. No observable dependence of the line width on temperature was found. From the ratio of the line widths it is concluded that the main cause of the line width in NaBrO₃ is the magnetic dipole interaction, and the contribution from the relaxation is of the order of 0.1 kc.