Experimental data pertaining to all nuclei with mass number A=169 (Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Re, Os, Ir, Pt) have been evaluated. Level schemes from both radioactive decay and reaction studies are presented, along with associated tables of experimental data and adopted properties for levels and γ rays. The present evaluation for A=169 supersedes the 2008 evaluation, 2008Ba31, by C.M. Baglin. A few highlights of this evaluation: More extensive work on ε decay from 169 W is needed and new experimental work will be required to resolve a discrepancy between the J π values deduced for a 180-keV level in 169 Ta based on extensive band structure from (HI,xn γ ) work (J π =1/2 − ) and TDPAD measurements (J=5/2). Low lying states of 169 Os were studied via fine structure of 173 Pt α decay in 2014ThZZ. The E α s feeding the g.s. of 169 Os in 2008Ba31 are separated well into two consistent groups to feed the g.s. and the newly proposed state at 34.84 keV. Based on the studies of 2014ThZZ and 2021Zh52, the g.s. spin-parity assignment of 169 Os has been proposed to be (7/2 − ) from (5/2 − ). The 169 Ir g.s. half-life and alpha emission branching reported in 2012Th13 from 173 Au α decay measurements are preferred over the values in 2005Sc22. The reported half-life value in 2005Sc22 for 169 Ir g.s. is discrepant and the research work was carried out in the same lab of 2012Th13.
M. Shamsuzzoha Basunia (Sun,) studied this question.