Hyperfine Structure and Nuclear Moments of Bromine-82

Abstract

The nuclear spin, the magnetic dipole, and the electric quadrupole interaction constants have been measured for 35-hr bromine-82 by the method of atomic beams. The results are $I=5$, $|a|=205.04\ifmmode\pm\else\textpm\fi{}0.05$ Mc/sec, $|b|=870.7\ifmmode\pm\else\textpm\fi{}0.9$ Mc/sec, and $\frac{b}{a}=\ensuremath{-}4.246\ifmmode\pm\else\textpm\fi{}0.001$.The nuclear magnetic and electric quadrupole moments obtained from these values of $a$ and $b$ are $|\ensuremath{\mu}|=1.6264\ifmmode\pm\else\textpm\fi{}0.0005$ nm, and $|Q|=0.76\ifmmode\pm\else\textpm\fi{}0.03$ barn. While only the relative sign of $\ensuremath{\mu}$ and $Q$ is determined, both $\ensuremath{\mu}$ and $Q$ are almost certainly positive. A new method for solving the interaction Hamiltonian with magnetic field, for arbitrary $I$ and $J$, by using an IBM 650 computer, is described.