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[en] Rotational bands were identified and extended in "1"0"4","1"0"6Nb by means of γ-γ-γ and γ-γ-γ-γ measurements of prompt fission γ rays from "2"5"2Cf. The triple-gated 4d data with a high event accumulation turned out to be very powerful. Potential energy surface (PES) and projected shell model (PSM) calculations were made and compared to the data. Spin/parity, configuration and shape were assigned to the ground, low-lying levels and band-heads of "1"0"4","1"0"6Nb. The proton intruder orbital π1/2"+[431] coupled with neutron excitations explains the isomeric decay of "1"0"6Nb, and reveals a shape evolution from partially triaxial deformations at ground levels to nearly axially-symmetric shapes at band-heads of both Nb isotopes. The PES and PSM calculations reproduced very well the similar bands as well as the differences in "1"0"6Nb and "1"0"4Nb. (author)
Source
Physical Society of Japan, Tokyo (Japan); 1146 p; ISBN 978-4-89027-110-8; 
; Jun 2015; p. 030011.1-030011.4; ARIS2014: 2. conference on advances in radioactive isotope science; Tokyo (Japan); 1-6 Jun 2014; Available from http://dx.doi.org/10.7566/JPSCP.6.030011; 10 refs., 4 figs.
; Jun 2015; p. 030011.1-030011.4; ARIS2014: 2. conference on advances in radioactive isotope science; Tokyo (Japan); 1-6 Jun 2014; Available from http://dx.doi.org/10.7566/JPSCP.6.030011; 10 refs., 4 figs.