Levels in 153Gd and 155Gd Studied with the (p,t) Reaction

Abstract
States in 153Gd and 155Gd have been populated with (p,t) reactions induced by 18 MeV protons. In 155Gd, strong l = 0 transitions were found to the 3/2[521] ground state and the 3/2 β-vibrational state. Excited rotational members of the ground state band and the β-vibrational band were also identified. Strong l = 0 transitions were observed to the ground state, the 129, 509, and 531 keV levels in 153Gd. The population of members of the previously suggested ground state band in 153Gd confirms the earlier 3/2[521] assignment. It is proposed that the 129 keV level is a mixed state of which the major component may be the 3/2 1/2[530] Nilsson state. The 509 keV (3/2) and 549 keV (5/2) levels populated in the present experiment are probably members of a β-vibrational band in 153Gd. No explanation is offered for the strongly populated 3/2 level at 531 keV.