Nuclear Data Sheets for A = 139

The experimental nuclear spectroscopic data for known nuclides of mass number 139 (Sn, Sb, Te, I, Xe, Cs, Ba, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy) have been evaluated and presented together with adopted properties for levels and gamma rays. This evaluation represents a revision of previous one (2001Bu16) by T.W. Burrows. Since then extensive new data have become available for many A=139 nuclides although, no excited state data are yet available for ¹³⁹Sn, ¹³⁹Sb, ¹³⁹Tb, and ¹³⁹Dy. The decay schemes of ¹³⁹Sn, ¹³⁹Sb, ¹³⁹I, ¹³⁹Tb and ¹³⁹Dy nuclei are not known, and those for ¹³⁹Gd and ¹³⁹Eu are poorly known. Particle-transfer data are available for ¹³⁹Ba, ¹³⁹La, ¹³⁹Ce and ¹³⁹Pr. Limited high-spin data are available for ¹³⁹Te, ¹³⁹I, ¹³⁹Cs, ¹³⁹Ba, ¹³⁹La and ¹³⁹Ce, while such data are extensive for ¹³⁹Pr, ¹³⁹Nd, ¹³⁹Pm, ¹³⁹Sm, ¹³⁹Eu and ¹³⁹Gd. Recent ¹³⁹Pm high-spin data from two independent studies using the same reaction and similar beam energy are in conflict and could be improved using state-of-the-art large gamma-detector arrays in contrast to the smaller arrays currently used. Cases for which no new experimental information are available since the last update have undergone checking resulting in some changes in the current work, but for the most part these are taken from the previous evaluations. Thus, the present work has greatly benefited from all prior NDS evaluations (2001Bu16, 1989Bu12, 1981Pe04, 1974Gr46), but at the same time data presented herein supersede those in the earlier evaluations.