In-beam gamma-ray spectroscopy of 190, 197Po

被引：0
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作者：
D. R. Wiseman
A. N. Andreyev
R. D. Page
M. B. Smith
I. G. Darby
S. Eeckhaudt
T. Grahn
P. T. Greenlees
P. Jones
R. Julin
S. Juutinen
H. Kettunen
M. Leino
A. -P. Leppänen
M. Nyman
J. Pakarinen
P. Rahkila
M. Sandzelius
J. Sarén
C. Scholey
J. Uusitalo
机构：
[1] University of Liverpool,Department of Physics, Oliver Lodge Laboratory
[2] TRIUMF,Department of Physics
[3] University of Jyväskylä,Department of Physics
[4] Royal Institute of Technology,undefined
来源：
The European Physical Journal A | 2007年 / 34卷
关键词：
23.20.Lv γ transitions and level energies; 25.70.-z Low and intermediate energy heavy-ion reactions; 27.80.+w 190 ⩽ ; ⩽ 219 ; 21.60.Ev Collective models;
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摘要：
γ -ray transitions in the neutron-deficient nuclei 190, 197Po have been identified using the JUROGAM Ge detector array coupled to the RITU gas-filled separator and the GREAT spectrometer. The yrast band of 190Po has been firmly established through γ -γ coincidences and extended up to a spin and parity of 14+. It displays similar behaviour to its isotones 186Hg and 188Pb above the 4+ level, thus confirming its prolate nature. In 197Po the band built upon the 13/2+ isomer has been extended up to a spin and parity of 33/2+, while the non-yrast band has been observed for the first time. The behaviour of 197Po is found to be similar to that of the nearby even-mass isotopes, which is consistent with the model in which the i13/2 neutron is weakly coupled to the states in the even-even core.
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页码：275 / 281
页数：6
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