Evidence for Chiral Symmetry in 136Pm and 138Eu


Evidence for Chiral Symmetry in 136Pm and 138Eu

Hecht, A. A.; Beausang, C. W.; Zyromski, K. E.; Balabanski, D. L.; Barton, C. J.; Caprio, M. A.; Casten, R. F.; Cooper, J. R.; Hartley, D. J.; Krücken, R.; Meyer, D.; Newman, H.; Novak, J. R.; Paul, E. S.; Pietralla, N.; Wolf, A.; Zamfir, N. V.; Jing-Ye, Z.; Dönau, F.

High-spin states in the doubly odd N=75 nuclei Pm-136 and Eu-138 were populated following the Sn-116(Mg-24,p3n) and Cd-106(Cl-35,2pn) reactions, respectively. A new ΔI = 1 band is reported in Eu-138 and new data are presented for the recently reported band in Pm-136. Polarization and angular correlation measurements have been performed to establish the relative spin and parity assignments for these bands. Both bands have been assigned the same πh 11/2νh 11/2 structure as the yrast band and are suggested as candidates for chiral twin bands.

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