Nuclear Data Sheets for A = 151

Abstract

Abstract:Nuclear spectroscopic information for known nuclides of mass number 151 (Cs, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) with Z=55, 58 to 71 and N=96, 93 to 80 have been evaluated and presented together with adopted energies and Jπ of levels in these nuclei. No excited state data are yet available for151Cs,151Ce, and151Lu. The existence of151Cs is reported from mass separation of products from U(p,X) reaction but there is no information about its half-life.In151Tb and151Dy, Several excited superdeformed bands have been reported, in addition to the yrast superdeformed band. This evaluation represents a revision of earlier (88Si15) Nuclear Data Sheets for A = 151.Cutoff Date:Literature available up to January 15, 1997 has been consulted.General Policies and Organization of Material:See the January issue of Nuclear Data Sheets.Acknowledgments:The evaluator thanks M. J. Martin at Oak Ridge National Laboratory for a detailed and constructive review of the mass chain, especially, concerning adopted γ-ray branching ratios.General Comments:The statistical analysis of γ-ray data and deduced level schemes is carried out through computer codes available at Isotopes Project, Berkeley and Nuclear Data Center, Brookhaven. The methodology and procedures for some of these codes are described by 86BrZQ and 86Br21. A general 3% uncertainty is assumed is quoted theoretical internal conversion coefficients taken mainly from 68Ha53. The values of μ and Q are from compilation by 89Ra17, when available.