EPJ Web of Conferences
Volume 66, 2014INPC 2013 – International Nuclear Physics Conference
|Number of page(s)||4|
|Published online||20 March 2014|
Study of shape transition in the neutron-rich Os isotopes
1 Dipartimento di Fisica e Astronomia, Università degli Studi di Padova, Padova, Italy
2 INFN Sezione di Padova, Padova, Italy
3 INFN Laboratori Nazionali di Legnaro, Legnaro, Italy
4 Department of Physics, University of Surrey, Guildford, United Kingdom
5 School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom
6 Dipartimento di Fisica, Università degli Studi di Firenze, Firenze, Italy
7 INFN Sezione di Firenze, Firenze, Italy
8 Dipartimento di Fisica, Università degli Studi di Milano, Milano, Italy
9 INFN Sezione di Milano, Milano, Italy
10 University of Brighton, Brighton, United Kingdom
11 Instituto de Física Corpuscular, CSIC, Valencia, Spain
12 CEA/Saclay, IRFU/Service de Physique Nucleaire, Gif-sur-Yvette, France
13 İstanbul Üniversitesi, İstanbul, Turkey
14 Institut Ruđer Bošković, Zagreb, Croatia
15 Dipartimento di Fisica, Università degli Studi di Torino, Torino, Italy
16 INFN Sezione di Torino, Torino, Italy
a e-mail: email@example.com
Published online: 20 March 2014
The neutron-rich isotopes of tungsten, osmium and platinum have different shapes in their ground states and present also shape transitions phenomena. Spectroscopic information for these nuclei is scarce and often limited to the gamma rays from the decay of isomeric states. For the neutron-rich even-even osmium isotopes 194Os and 198Os, a shape transition between a slightly prolate deformed to an oblate deformed ground state was deduced from the observed level schemes. For the even-even nucleus lying in between, 196Os, no gamma ray transition is known. In order to elucidate the shape transition and to test the nuclear models describing it, this region was investigated through gamma-ray spectroscopy using the AGATA demonstrator and the large acceptance heavy-ion spectrometer PRISMA at LNL, Italy. A two-nucleon transfer from a 198Pt target to a stable 82Se beam was utilized to populate medium-high spin states of 196Os. The analysis method and preliminary results, including the first life-time measurement of isomeric states with AGATA, are presented.
© Owned by the authors, published by EDP Sciences, 2014
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