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- Title
In-beam gamma-ray spectroscopy of <sup>190, 197</sup>Po.
- Authors
Wiseman, D. R.; Andreyev, A. N.; Page, R. D.; Smith, M. B.; Darby, I. G.; Eeckhaudt, S.; Grahn, T.; Greenlees, P. T.; Jones, P.; Julin, R.; Juutinen, S.; Kettunen, H.; Leino, M.; Leppänen, A.-P.; Nyman, M.; Pakarinen, J.; Rahkila, P.; Sandzelius, M.; Sarén, J.; Scholey, C.
- Abstract
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 i 13/2 neutron is weakly coupled to the states in the even-even core.
- Subjects
SPECTRUM analysis; GAMMA rays; SPECTROMETERS; ISOTONE shift; SPECTROSCOPE
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2007, Vol 34, Issue 3, p275
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/i2007-10507-2