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High-spin excitations of 81, 82, 83, 85Se : Competing single-particle and collective structures around N = 50.
- Source :
-
European Physical Journal A -- Hadrons & Nuclei . Mar2009, Vol. 39 Issue 3, p295-306. 12p. 7 Diagrams, 6 Charts, 7 Graphs. - Publication Year :
- 2009
-
Abstract
- The 81, 82, 83, 85Se nuclei have been produced as fission fragments in the fusion reaction 18O + 208Pb at 85MeV bombarding energy and studied with the Euroball IV array. Their high-spin level schemes have been built from the triple $ \gamma$ -ray coincidence data and $ \gamma$ - $ \gamma$ angular correlations have been analyzed in order to assign spin and parity values to many observed states. The lowest-spin states of the two-neutron and three-neutron configurations are strongly mixed with two-proton excitations among the fp orbits. On the other hand, the highest-spin states of these neutron configurations are found to remain almost pure. Neutron excitation across the N = 50 gap is observed both in 83Se49 and in 85Se51 . [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14346001
- Volume :
- 39
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- European Physical Journal A -- Hadrons & Nuclei
- Publication Type :
- Academic Journal
- Accession number :
- 37042774
- Full Text :
- https://doi.org/10.1140/epja/i2008-10723-2