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

Authors :: Venhart, M.
Balogh, M.
Herzáň, A.
Wood, J.L.
Ali, F.A.
Joss, D.T.
Andreyev, A.N.
Auranen, K.
Carroll, R.J.
Drummond, M.C.
Easton, J.L.
Greenlees, P.T.
Grahn, T.
Gredley, A.
Henderson, J.
Jakobsson, U.
Julin, R.
Juutinen, S.
Konki, J.
Lawrie, E.A.
Leino, M.
Matoušek, V.
McPeake, C.G.
O'Donnell, D.
Page, R.D.
Pakarinen, J.
Papadakis, P.
Partanen, J.
Peura, P.
Rahkila, P.
Ruotsalainen, P.
Sandzelius, M.
Sarén, J.
Saygı, B.
Sedlák, M.
Scholey, C.
Sorri, J.
Stolze, S.
Thornthwaite, A.
Urban, R.
Uusitalo, J.
Veselský, M.
Wearing, F.P.
Source :: Physics Letters
Publication Year :: 2020
Publisher :: Elsevier, 2020.
Abstract: The extremely neutron-deficient isotopes $^{177,179}$Au were studied by means of in-beam γ-ray spectroscopy. Specific tagging techniques, α-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 2d3/2 and 3s1/2 proton-hole configurations, from the 1i13/2 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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