The decays of 21.55 min 162gTm and 24.3 s 162Tm (a new isomer)

Discovery of isomers in dysprosium, holmium, and erbium isotopes withN=94to 97

“…III C, the spin 7 assignment for this level, reported by De Boer et al [23] and Janssens et al [22] on the basis of angular distributions, was supported by the similarity of the isomer's decay with that of a 7 − isomer in 164 Er. BCS calculations support this assignment further, predicting the 7 − (π 7/2 − [523]π 7/2 + [404]) only 4 keV from the experimental energy of the isomer (see Table VI).…”

“…11. The two branches from the isomer have been previously reported by De Boer et al [23] and Janssens et al [22] with both works assigning a spin of 7 to the parent level on the basis of angular distributions. Neither work reported the level as an isomer.…”

High-spin negative parity band in162Er

“…These results establish negative parity for the side band. In a recent study of the decay of the 21.5 min and 24 s isomers of 162Tm, other negative parity states in 162Er have been proposed [4]. These are states at 1,352 keV, 1-; 1,357 keV, 3-; 1,506 keV, (1-); 1,573 keV, 2 ; 1,623 keV, 3-; and 1,730 keV, (3-).…”

“…The 3-assignment for the former state is based on its relatively strong population in the (d, d') reaction [5]. In the decay of 21.5 min ~62Tm, however, a transition is placed between the 1,623 keV state and the ground state [4]. If this placement is correct, the 3 -assignment is questionable.…”