Nuclear Structure and Decay Data for A=165 Isobars

Abstract

Experimental nuclear spectroscopic data are compiled and evaluated for 18 known nuclides of mass 165 (Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Re, Os, Ir, Pt). Detailed information is presented for each reaction and decay experiment. Combining all the available data, recommended values are provided for energies, spins and parities, and half-lives of levels, with energies, branching ratios and multipolarities of γ radiations, and characteristics of β and α radiations in radioactive decays. ¹⁶⁵Dy, ¹⁶⁵Ho, ¹⁶⁵Er, ¹⁶⁵Tm, ¹⁶⁵Yb, ¹⁶⁵Lu and ¹⁶⁵Hf are among the most extensively studied nuclides via decay and high-spin gamma-ray spectroscopy measurements, followed by limited data for ¹⁶⁵Tb, ¹⁶⁵Ta, ¹⁶⁵W, ¹⁶⁵Re, and ¹⁶⁵Os. No excited states have yet been identified in ¹⁶⁵Sm, ¹⁶⁵Gd, and ¹⁶⁵Pt, while for ¹⁶⁵Eu and ¹⁶⁵Ir, information is available for only the g.s. and an isomer, but with no γ rays. This work supersedes earlier evaluation of A=165 nuclides by 2006Ja09.