Band crossing and shape evolution in 73Ge.

Authors :: Sun, J. J.
Xu, C.
Li, X. Q.
Hua, H.
Zhang, S. Q.
Xu, F. R.
Liang, W. Y.
Jiao, C. F.
Meng, J.
Wu, X. G.
Hu, S. P.
Zhang, H. Q.
H. Li, Z.
Ye, Y. L.
Jiang, D. X.
Cheng, Y. Y.
He, C.
Han, R.
Niu, C. Y.
Li, C. G.
Source :: Physical Review C: Nuclear Physics. Nov2015, Vol. 92 Issue 5, p1-7. 7p.
Publication Year :: 2015
Abstract: The spectroscopy of 73Ge has been investigated via the 70Zn(7Li,3np) 73Ge fusion-evaporation reaction. A previously known band built on the v(f5/2) orbital is extended up to higher-spin states and a new rotational band built on the v(g9/2) orbital is established. The observed band crossing and shape evolution induced by the alignment in 73Ge are studied in comparison with the similar structures in the neighboring N = 41 isotones and the cranked Woods-Saxon-Strutinsky calculations by means of total-Routhian-surface (TRS) methods. The inversion of the order of the g9/2 neutron and the g9/2 proton crossing frequency observed in the negative-parity v(f5/2) bands between 73Ge and 75Se, 77Kr can be ascribed to their different triaxial deformations. At higher spins, both the v(f5/2) and v(g9/2) bands in 73Ge undergo a shape evolution with sizable alignments occurring. The characters of large signature splitting in v(g9/2) band of 73Ge are discussed. [ABSTRACT FROM AUTHOR]