Population of a low-spin positive-parity band from high-spin intruder states in Au-177: The two-state mixing effect

Venhart M., Balogh M., Herzan A., Wood J. L. , Ali F. A. , Joss D. T. , ...Daha Fazla

PHYSICS LETTERS B, cilt.806, 2020 (SCI İndekslerine Giren Dergi) identifier identifier


The extremely neutron-deficient isotopes Au-177,Au-179 were studied by means of in-beam gamma-ray spectroscopy. Specific tagging techniques, alpha-decay tagging in Au-177 and isomer tagging in Au-179, were used for these studies. Feeding of positive-parity, nearly spherical states, which are associated with 2d(3/2) and 3s(1/2) proton-hole configurations, from the 1i(13/2) proton-intruder configuration was observed in Au-177. Such a decay path has no precedent in odd-Au isotopes and it is explained by the effect of mixing of wave functions of the initial state. (C) 2020 Published by Elsevier B.V.