In-beam gamma-ray spectroscopy of Po-190 : First observation of a low-lying prolate band in Po isotopes

Authors :: Van De Vel, K.
Andreyev, A. N.
Page, R. D.
Kettunen, H.
Greenlees, P. T.
Jones, P.
Julin, R.
Juutinen, S.
Kankaanpaa, H.
Keenan, A.
Kuusiniemi, P.
Leino, M.
Muikku, M.
Nieminen, P.
Rahkila, P.
Uusitalo, J.
Eskola, K.
Hurstel, A.
Huyse, M.
Le Coz, Y.
Smith, M. B.
Van Duppen, P.
Wyss, Ramon
Van De Vel, K.
Andreyev, A. N.
Page, R. D.
Kettunen, H.
Greenlees, P. T.
Jones, P.
Julin, R.
Juutinen, S.
Kankaanpaa, H.
Keenan, A.
Kuusiniemi, P.
Leino, M.
Muikku, M.
Nieminen, P.
Rahkila, P.
Uusitalo, J.
Eskola, K.
Hurstel, A.
Huyse, M.
Le Coz, Y.
Smith, M. B.
Van Duppen, P.
Wyss, Ramon
Publication Year :: 2003
Abstract: Gamma rays from excited states of Po-190 have been observed using I the Jurosphere Ge-detector array coupled to the RITU gas-filled separator. They were associated with a collective band which from spin 4h onwards resembles the prolate rotational bands known in the isotones Pb-188 and Hg-186. This indicates that in Po-190 the prolate configuration becomes yrast above I = 2h. The experimental results are interpreted in a two-band mixing calculation and are in agreement with a-decay data and potential energy surface calculations.<br />QC 20100525

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