Av. Derbin et al., NEW LIMITS ON HALF-LIVES OF SM-154, GD-160, ER-170, AND YB-176 WITH RESPECT TO DOUBLE-BETA DECAY TO EXCITED 2(+) STATES OF DAUGHTER NUCLEI, Physics of atomic nuclei, 59(12), 1996, pp. 2037-2040
Double beta decays to excited 2(+) states of daughter nuclei are sough
t for Sm-154, Gd-160, Er-170, and Yb-176 with a germanium detector. Li
mits on the corresponding half-lives of these nuclei are found to be 1
0(17)-10(18) yr.