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

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 asso...

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Detalles Bibliográficos
Autores principales: 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
Lenguaje:eng
Publicado: 2020
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2020.135488
http://cds.cern.ch/record/2815856
Descripción
Sumario: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 $2d_{3/2}$ and $3s_{1/2}$ proton-hole configurations, from the $1i_{13/2}$ 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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