Abstract

Energy-level analyses of the observed emission spectrum of berkelium have yielded 179 odd and 186 even levels of neutral berkelium, Bk i, and 42 odd and 117 even levels of singly ionized berkelium, Bk ii. The levels are tabulated with the J value, the g value, the configuration and hyperfine constants A and B, and the width given for many of the levels. The ground states of Bk i and Bk ii are $[\text{Rn}]5f{}^{9}7s^2\hspace{0.17em}{{}^{6}H}_{15/2}^{\circ }$ and $[\text{Rn}]5f{}^{9}7s\hspace{0.17em}{{}^{7}H}_8^{\circ }$, respectively. A table lists the lowest level of each identified electronic configuration of Bk i and Bk ii.

© 1987 Optical Society of America

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