Zeeman NQR Studies on Powdered Bromine Compounds Having Small η

Abstract

The Zeeman NQR of 79 Br and 81 Br in samples having relatively small r\ was studied on several bromine compounds which were in the powder or polycrystal state. The absorption lines were detected in the integral form by the bridge circuit. When a static magnetic field was applied, the line shapes were broadened and usually two dips appeared symmetrically at both sides of the zero field line. The values of rj were estimated from the patterns of the dips. For compounds such as NaBr0 3 , however, as expected no dips were observed.

Powder Zeeman NQR Study on the Absorption Forms for Nuclear Spin 5/2

“…However, the PZNQR methods based on the detection in a differential form sometimes led to noticeable errors in estimating 77 values, compared to the method using SZNQR. We have observed the PZNQR spectra in simple integral forms using a bridge circuit and obtained the 77 values for sever- al nuclei with spin 3/2, which are in good agreement with those evaluated from SZNQR [10][11][12][13][14], In this paper we report an experimental and simulation study on PZNQR for nuclear spin 5/2. Although 77 values are approximately obtained only from the frequencies of two NQR lines for nuclear spin 5/2, it is obvious that the PZNQR method is another useful way to estimate small 77 values.…”

Solid-state NMR spectroscopy of the quadrupolar halogens: chlorine-35/37, bromine-79/81, and iodine-127

“…We have not attempted to cover solution NMR results, 13 zero-field NMR results, 14 -16 NQR, 17 -20 or Zeeman-NQR results. 21,22 It is certainly recognized that these methods also provide valuable information on the nuclear environments in the form of, for example, quadrupolar coupling tensors and relaxation rate constants. We note, for example, the detailed review of quadrupolar halogen solution NMR by Lindman and Forsén.…”