Nuclear data sheets for A = 151

High-spin parity doublets in the nucleus 151Pm

“…In the present work we report the observation of high-spin parity doublets in the odd-Z nucleus 1651Pm. The experimental information for ~S~pm was re-evaluated recently [5] and has been interpreted in favour of the octupole deformation in this nucleus [ 6 ]. In our work we established alternating-parity bands with enhanced E1 transitions which suggest an octupole shape at high spins in ~5~Pm.…”

“…In the present work we identified 68 7 rays belonging to ~5'Pm, 16 of which have been reported previously. The assignment to the nucleus ]5'Pm is based on coincidences with known transitions in this nucleus [5 ]. Intensities of'/rays have been determined from the coincidence data.…”

Band structure in the neutron-rich lanthanide nucleusNd152. I. Anomalous properties of theHellström1, Fogelberg2, Mach3 et al. 1992Phys. Rev. C9080View full textAdd to dashboardCite

“…The small deformed shell gap at Z = 60 is negligible at deformations of about t = 0.2, corresponding to~SNd, but adds significantly to the energy required to break a pair when e is near 0.3. The t deformation parameters of o Nd are close to the latter value, see Table III [35,36] the deformation driving 3/2+ [651] orbital. Assuming that the same orbital is occupied by the valence neutron pair of Nd, one finds that any reasonable excitation of that pair leads to orbitals having higher 0, thereby not tending as strongly towards deformation as the ground state configuration.…”

Microscopic structures of parity doublets in the151Pm,153Eu and155Eu nuclei

“…Empirical values have been obtained in the least-squares fit procedure using a simple rotational formula with three free parameters, namely, the intrinsic energy, the rotational parameter and the decoupling parameter. Experimental energies are taken from [27][28][29] …”