Configuration-dependent deformations in 171Re

Delayed neutron alignment inI117

“…The interpretation of this effect was originally attributed to a larger nuclear quadrupole deformation induced by the occupation of the high-j intruder orbital. Similar eA'ects have subsequently been established in this mass region for the tr[660] 2 intruder from the ni i 3/2 subshell [3,4].…”

Collective excitations in the transitional nucleiRe163andRe165

“…The low-spin excited states in 163 Re and 165 Re are found to have a structure similar to that of the yrast bands in the heavier Re isotopes [11,[35][36][37][38], which are based on an odd proton occupying the h 11/2 [514]9/2 − Nilsson orbital. Figure 8 shows the evolution of the 9/2 − , 13/2 − , and 17/2 [35,36], and 167 Re [5] is 160, 157, 136, and 92 keV, respectively (see Fig.…”

“…Assuming that this trend extrapolates to 163 Re and that the α-decaying state has spin-parity of 9/2 − , the transition energy between the 11/2 − and the 9/2 − states would be very low − bands in the neutron-deficient odd-A rhenium isotopes 163 Re (band 1), 165 Re, 167 Re [11], 169 Re [35,36], and 171 Re [37,38]. Filled (open) symbols represent the α = −1/2 (α = +1/2) signatures, respectively.…”

“…The single-quasiproton configuration in the heavier isotopes 167−171 Re is crossed by the three-quasiparticle πh 11/2 ⊗ (νi 13/2 ) 2 configuration [11,[35][36][37][38]. Above this crossing there is a dramatic reduction in signature splitting.…”

Revision of the decay data of166?170Re, including new isomers167m,169mRe

“…10 it seems that a decrease in energy of the 1/2 + [411J orbital is indicated when proceeding towards more neutron-deficient nuclei. In 171Re, a sequence of transitions associated with the 1/2 + [411] band was observed [32]. If this configuration would come steeply down, it might also contribute at low excitation energy to the single-particle structure of very neutron-deficient rhenium isotopes, and then also be a candidate for isomeric states.…”