Observation and analysis of particle-core multiplets inPd105

New lifetime measurements inPd109and the onset of deformation atN=60

“…Single-neutron transfer [21,[24][25][26][27][28][29] and high spin studies [41][42][43][44][45][46][47][48] indicate that one of these levels consistently displays a νg 7/2 single-particle character, while the other can be described as a νd 5/2 ⊗ 2 + 1 configuration. This distinction is based on the observed spectroscopic strengths (Table II) and band structures connected to them (Fig.…”

“…5). Another possible complication is admixture in 105 Pd from a signature of the νg 7/2 band as suggested by the results of Rickey et al [45] (see also Fig. 5).…”

“…Moreover, the πg 9/2 -νg 7/2 interaction had been proposed early on by Federman and Pittel to be responsible for the onset of deformation in the Zr and Mo isotopes [54]. A shape change to large deformation is also evident in the band structure of the odd-mass Pd isotopes [41][42][43][44][45][46][47][48] (Fig. 5) and suggested by B(E2) systematics [21,[55][56][57][58][59].…”

“…A sudden shape change is apparent at 107 Pd at higher spins, however the band assignments are uncertain in this nucleus due to mixing of the low-lying 7/2 + states. The purple levels highlight the 5/2 + 2 states and associated band structure observed in 105 Pd [45]. [21,[24][25][26][27][28][29].…”

“…6), and 3) the unpaired neutrons in the odd-mass Pd isotopes prefer to sit in the d 5/2 orbital. In fact, 2) is not entirely unexpected since the νg 7/2 is predicted to come down in energy due to the interaction with valence g 9/2 pro- trend coinciding with the d 5/2 ground-state band switching from ∆J=2 to ∆J=1 [41,43,45]. Data taken from NNDC nuclear database [21].…”