The first candidate for chiral nuclei in the $A\sim80$ mass region: $^{80}$Br

Authors :: Wang, S. Y.
Qi, B.
Liu, L.
Zhang, S. Q.
Hua, H.
Li, X. Q.
Chen, Y. Y.
Zhu, L. H.
Meng, J.
Wyngaardt, S. M.
Papka, P.
Ibrahim, T. T.
Bark, R. A.
Datta, P.
Lawrie, E. A.
Lawrie, J. J.
Majola, S. N. T.
Masiteng, P. L.
Mullins, S. M.
Gál, J.
Kalinka, G.
Molnár, J.
Nyakó, B. M.
Timár, J.
Juhász, K.
Schwengner, R.
Publication Year :: 2011
Abstract: Excited states of $^{80}$Br have been investigated via the $^{76}$Ge($^{11}$B, $\alpha$3n) and $^{76}$Ge($^{7}$Li, 3n) reactions and a new $\Delta I$ = 1 band has been identified which resides $\sim$ 400 keV above the yrast band. Based on the experimental results and their comparison with the triaxial particle rotor model calculated ones, a chiral character of the two bands within the $\pi g_{9/2}\otimes \nu g_{9/2}$ configuration is proposed, which provides the first evidence for chirality in the $A\sim80$ region.<br />Comment: 15 pages, 6 figures, accepted for publication in Physics Letters B