Nuclear Data Sheets for A = 81

Nuclear structure data pertaining to all nuclei with mass number A = 81 (Zn, Ga, Ge, As, Se, Br, Kr, Rb, Sr, Y, Zr, Nb) have been compiled and evaluated and incorporated into the ENSDF data file. This publication for A = 81 supersedes the previous publication (Coral M. Baglin, Nuclear Data Sheets 79, 447 (1996), literature cutoff 1 November 1996) and the subsequent updates by C. Baglin for 81Y (literature cutoff 8 October 1998) and 81Zr (literature cutoff 24 March 2000). All literature available prior to 15 August 2008 has been considered. Subsequent to previous A = 81 evaluations, excited states have been reported for the first time in 81Ga, and knowledge of excited state properties for 81Y and 81Zr has been significantly expanded. However, the expected ɛ+β+ decay of 81Zr has yet to be studied.