Prolate deformation in the 187,189Bi isotopes

Autor: A. Keenan, Y. Le Coz, Andrei Andreyev, H. Kankaanpää, F. Becker, J. N. Wilson, A. Chatillon, Paul Greenlees, T. Enqvist, K. Hauschild, Pasi Kuusiniemi, A.-P. Leppänen, Heikki Kettunen, Juha Uusitalo, R. Julin, S. Juutinen, M. Muikku, Andreas Görgen, Ch. Theisen, Peter M. Jones, Paivi Nieminen, W. Korten, P. Rahkila, Matti Leino, M. Rejmund, A. Hürstel, E. Bouchez, Janne Pakarinen
Rok vydání: 2004
Předmět:
Zdroj: The European Physical Journal A. 21:365-368
ISSN: 1434-601X
1434-6001
Popis: Prompt and delayed gamma-ray spectroscopy of very neutron-deficient bismuth isotopes 187, 189Bi has been performed using the recoil decay tagging method. A rotational band has been observed in 189Bi and is interpreted as a complete decoupling of a single proton from the deformed lead core. The results for 187Bi suggest a similar structure and coupling scheme. This study gives the first evidence for a prolate band in a light bismuth nucleus and confirms the prolate character of the low-lying rotational band observed in the core nuclei 188Pb and 186Pb.
Databáze: OpenAIRE