Zeeman Splitting of Nuclear Quadrupole Resonance Line of Bromine

With a single crystal of about 35 g, which was prepared by the method of the pointed-bottom crucible. Zeeman patterns of the pure quadrupole spectrum of bromine were studied. The observations were carried out in the following orientations of the magnetic fields: (1) parallel to the b axis of the crystal, (2) parallel to the c axis and (3) about 43° from the b axis in the a plane. The pattern at the b axis, where the magnetic field was perpendicular to all molecular bonds, consisted of four lines. This indicated the existence of asymmetry in the field gradient tensor. The asymmetry parameter η was determined as 20 percent. This large value was discussed from the standpoint of resonance switching of auxiliary bonds.