ISSN:
1434-601X
Keywords:
23.20.Lv
;
23.20.Ck
;
27.50.+e
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Excited states in78Se have been studied up to spin (12)ℏ at about 5.8 MeV in the76Ge(α, 2n) reaction using in-beamγ-ray spectroscopy. Mean lifetimes could be determined for 27 of the 33 levels observed by applying Doppler shift and pulsed-beam timing methods. According to theB(E2) values most of the levels have been grouped into collective bands. Irregularities in the level spacings of the yrast band above spin 6ℏ are interpreted to be due to the interaction of the ground state band withg 9/2 two-proton and two-neutron excitations. The mutual mixing of these configurations is reflected by strongM 1 transitions between the mixed states. The interaction strengths between the configurations involved have been estimated from three-band mixing calculations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01297583