gJof the(5s5p)P13Level of Cd and the(6s6p)P13Level of Hg by High-Field Double Resonance

Abstract

An optical double resonance experiment at high magnetic fields has determined $g_J$ for the $\mathrm{}\left(5s5p\right)\mathrm{}{}_{}{}^3{}_{}{}^{}P_1^{}{}_{}{}^{}$ level of the even cadmium isotopes to be 1.499846(13), and $g_J$ for the $\mathrm{}\left(6s6p\right)\mathrm{}{}_{}{}^3{}_{}{}^{}P_1^{}{}_{}{}^{}$ level of the even mercury isotopes to be 1.486094(8). Resonance was observed in all cases at a frequency of exactly 24 Gc/sec, and magnetic fields near 11 430 G. At these high fields the Zeeman energy is of the order of ${10}^{-3\mathrm{}}$ of the fine structure separations of the triplet terms of the ($\mathrm{nsnp}$) configuration, and the $\Delta m=\pm 1$ transitions are split by 9.51(7) G for Cd, and by 2.99(7) G for Hg. This splitting represents several linewidths in the case of Hg, and many linewidths in that of Cd. The average field of the two $\Delta m=\pm 1$ transitions, however, determines $g_J$ to high precision independent of second-order corrections.