Evolution of chirality from gamma Soft Ru-108 to triaxial Ru-110,Ru-112
Luo, Y. X × Zhu, S. J Hamilton, J. H Rasmussen, J. O Ramayya, A. V Goodin, C Hwang, J. K Almehed, D Frauendorf, S Dimitrov, V Zhang, Jing-ye Che, X. L Jang, Z Stefanescu, Irina Gelberg, A Ter-Akopian, G. M Daniel, A. V Stoyer, M. A Donangelo, R Cole, J. D Stone, N. J #
Elsevier science bv
Physics letters b vol:670 issue:4-5 pages:307-312
Rotational bands in Ru-108,Ru-110,Ru-112 have been investigated by means of gamma-gamma-gamma and gamma-gamma(theta) coincidences of prompt gamma rays emitted in the spontaneous fission of Cf-252. The positive parity bands are described by different versions of IBA, where Ru-108 is best described as a gamma-soft nucleus whereas Ru-110,Ru-112 these are more like rigid triaxial rotors. New Delta I = 1 negative parity doublet bands are found. In case of Ru-110,Ru-112, these are interpreted as soft chiral vibrations. Many of the experimental findings can be explained by microscopic calculations that combine the TAC mean-field with random phase approximation but a simple geometrical explanation is not apparent.