Shell-model studies near the N=82 r-process waiting point

The experimental nuclear spectroscopic data for known nuclides of mass number 128 (Pd, Ag, Cd, In, Sn, Sb, Te, I, Xe, Cs, Ba, La, Ce, Pr, Nd, Pm) have been evaluated and presented together with adopted properties for levels and γ rays. This evaluation represents a revision of the previous one 14 years ago by M. Kanbe and K. Kitao (2001KA61). Extensive new data have become available for many nuclides in the intervening years. This work supersedes earlier NDS evaluations of A=128 nuclides.

The 1996 evaluation for the A=127 mass chain (1996Ki01) has been revised. The experimental results from various decays and reactions for the A=127 mass chain have been compiled and evaluated. The nuclides covered in this evaluation are from ¹²⁷Ag to ¹²⁷Nd. The data are summarized and presented, together with adopted level schemes.

The evaluated experimental data are presented for 17 known nuclides of mass 135 (In, Sn, Sb, Te, I, Xe, Cs, Ba, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb). For ¹³⁵In, ¹³⁵Eu, ¹³⁵Gd and ¹³⁵Tb, only the half-lives and isotopic identifications are established without any knowledge of their level structures and β decay schemes. Extensive high-spin structures are known for ¹³⁵Te, ¹³⁵I, ¹³⁵Ba, ¹³⁵La, ¹³⁵Ce, ¹³⁵Pr, ¹³⁵Nd, ¹³⁵Pm and ¹³⁵Sm; including a superdeformed structure in ¹³⁵Nd. Only limited high-spin data are available for ¹³⁵Sb and the data for ¹³⁵La are from a thesis only. Neutron capture γ-ray data are available in detail for ¹³⁵Ba (thermal and resonance energies) and marginally for ¹³⁵Cs (thermal neutrons). Single particle-transfer data exist for ¹³⁵Xe and ¹³⁵Ba; and marginally for ¹³⁵I and ¹³⁵La. In the opinion of the evaluators, the decay schemes from β decays of ¹³⁵Sn, ¹³⁵Xe, ¹³⁵Pr, ¹³⁵Pm isomers and ¹³⁵Sm are not well established. The absolute level energies in ¹³⁵Pm and ¹³⁵Sm are not known. This work supersedes earlier (1998Se07,1987Se11,1975He12) evaluations of A = 135.