Spectroscopic study of the possibly triaxial transitional nucleus 75Ge

Niu, C. Y. ; Dai, A. C. ; Xu, C. ; Hua, H. ; Zhang, S. Q. ; Wang, S. Y. ; Bark, R. A. ; Meng, Jie ; Wang, C. G. ; Wu, X. G. ; Li, X. Q. ; Li, Z. H. ; Wyngaardt, S. M. ; Zang, H. L. ; Chen, Z. Q. ; Wu, H. Y. ; Xu, F. R. ; Ye, Y. L. ; Jiang, D. X. ; Han, R. ; Li, C. G. ; Chen, X. C. ; Liu, Q. ; Feng, J. ; Yang, B. ; Li, Z. H. ; Wang, S. ; Sun, D. P. ; Liu, C. ; Li, Z. Q. ; Zhang, N. B. ; Guo, R. J. ; Li, G. S. ; He, C. Y. ; Zheng, Y. ; Li, C. B. ; Chen, Q. M. ; Zhong, J. ; Zhou, W. K. ; Zhu, B. J. ; Deng, L. T. ; Liu, M. L. ; Wang, J. G. ; Jones, P. ; Lawrie, E. A. ; Lawrie, J. J. ; Sharpey-Schafer, J. F. ; Wiedeking, M. ; Majola, S. N. T. ; Bucher, T. D. ; Dinoko, T. ; Magabuka, B. ; Makhathini, L. ; Mdletshe, L. ; Khumalo, N. A. ; Shirinda, O. ; Sowazi, K. (2018)

CITATION: Niu, C. Y., et al. 2018. Spectroscopic study of the possibly triaxial transitional nucleus 75Ge. Physical Review C, 97(3):034322, doi:10.1103/PhysRevC.97.034322.

The original publication is available at https://journals.aps.org/prc

Article

The collective structures of 75Ge have been studied for the first time via the 74Ge(α,2p1n) 75Ge fusionevaporation reaction. Two negative-parity bands and one tentative positive-parity band built on the νp1/2, νf5/2, and νg9/2 states, respectively, are established and comparedwith the structures in the neighboringN = 43 isotones. According to the configuration-constrained potential-energy surface calculations, a shape transition from oblate to prolate along the isotopic chain in odd-A Ge isotopes is suggested to occur at 75Ge. The properties of the bands in 75Ge are analyzed in comparison with the triaxial particle rotor model calculations.

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