Hyperfine-induced transitions S01−D13 in Yb

Abstract

Parity-violation experiment in Yb is made on the strongly forbidden $M1$ transition $6{s}^{2}\phantom{\rule{0.16em}{0ex}}^{1}S_{0}\ensuremath{\rightarrow}5d6s\phantom{\rule{0.16em}{0ex}}^{3}D_{1}$. The hyperfine mixing of the $5d6s\phantom{\rule{0.16em}{0ex}}^{3}D_{1}$ and $5d6s\phantom{\rule{0.16em}{0ex}}^{3}D_{2}$ levels opens the $E2$ channel, whose amplitude differs for $F$ sublevels of the $^{3}D_{1}$ level. This effect may be important for the experimental search for the nuclear-spin-dependent parity-violation effects predominantly caused by the nuclear anapole moment.