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

M. Venhart*, M. Balogh, A. Herzáň, J.L. Wood, F.A. Ali, D.T. Joss, A.N. Andreyev, K. Auranen, R.J. Carroll, M.C. Drummond, J.L. Easton, P.T. Greenlees, T. Grahn, A. Gredley, J. Henderson, U. Jakobsson, R. Julin, S. Juutinen, J. Konki, E.A. LawrieM. Leino, V. Matoušek, C.G. McPeake, D. O'Donnell, R.D. Page, J. Pakarinen, J. Partanen, P. Papadakis, P. Peura, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Sarén, B. Saygı, M. Sedlák, C. Scholey, J. Sorri, S. Stolze, A. Thornthwaite, R. Urban, J. Uusitalo, M. Veselský, F.P. Wearing

*Corresponding author for this work

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Abstract

The extremely neutron-deficient isotopes 177,179Au were studied by means of in-beam γ-ray spectroscopy. Specific tagging techniques, α-decay tagging in 177Au and isomer tagging in 179Au, 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 177Au. 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.

Original languageEnglish
Article number135488
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume806
Early online date14 May 2020
DOIs
Publication statusPublished - 10 Jul 2020

Keywords

  • in-beam spectroscopy
  • γ rays
  • 177Au
  • 179Au
  • two-state mixing

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