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Population of a low-spin positive-parity band from high-spin intruder states in $$^{177}$$Au; The Two-state mixing effect

$$^{177}$$Auにおける高スピンintruder状態からの低スピン正パリティバンドへの遷移; 2状態混合効果

Venhart, M.*; Balogh, M.*; Herz$'a$$v{n}$, A.*; Wood, J. L.*; Ali, F. A.*; Joss, D. T.*; Andreyev, A. N.; Auranen, K.*; Carroll, R. J.*; Drummond, M. C.*; 他33名*

Venhart, M.*; Balogh, M.*; Herz$'a$$v{n}$, A.*; Wood, J. L.*; Ali, F. A.*; Joss, D. T.*; Andreyev, A. N.; Auranen, K.*; Carroll, R. J.*; Drummond, M. C.*; 33 of others*

The extremely neutron-deficient isotopes $$^{177,179}$$Au were studied by means of in-beam $$gamma$$-ray spectroscopy. Specific tagging techniques, $$alpha$$-decay tagging in $$^{177}$$Au and isomer tagging in $$^{179}$$Au, were used for these studies. Feeding of positive-parity, nearly spherical states, which are associated with 2$$d_{3/2}$$ and 3$$s_{1/2}$$ proton-hole configurations, from the 1$$i_{13/2}$$ proton-intruder configuration was observed in $$^{177}$$Au. 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.

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