Study of the N=28 shell closure in the Ar isotopic chain : a SPIRAL experiment for nuclear astrophysics

Gaudefroy, L. and Sorlin, O. and Beaumel, D. and Blumenfeld, Y. and Dombradi, Z. and Fortier, S. and Franchoo, S. and Gelin, M. and Gibelin, J. and Grevy, S. and Hammache, F. and Ibrahim, F. and Kemper, K. and Kratz, K. L. and Lukyanov, S. M. and Monrozeau, C. and Nalpas, L. and Nowacki, F. and Ostrowski, A. N. and Penionzhkevich, Yu. -E. and Pollacco, E. and Roussel-Chomaz, P. and Rich, E. and Scarpaci, J. A. and St. Laurent, M. G. and Rauscher, T. and Sohler, D. and Stanoiu, M. and Tryggestad, E. and Verney, D.. (2006) Study of the N=28 shell closure in the Ar isotopic chain : a SPIRAL experiment for nuclear astrophysics. In: The 2nd International Conference on Nuclear Physics in Astrophysics. Berlin, Heidelberg, pp. 309-314.

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Official URL: http://edoc.unibas.ch/dok/A5253945

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The structure of the neutron-rich nucleus Ar-47 has been investigated through the d(Ar-46, Ar-47)p transfer reaction. The radioactive beam of Ar-46 at 10 A (.) MeV was provided by the SPIRAL facility at GANIL. The protons corresponding to a neutron pick-up on bound or unbound states mechanism in Ar-47 nuclei were detected at backward angles by the position-sensitive Si array-detector MUST. The transfer-like ejectiles were detected in the SPEG spectrometer. Level scheme, spin assignments and spectroscopic factors have been deduced for Ar-47 and compared to shell model predictions. They suggest a slight erosion of the N = 28 shell gap from the weakening of the spin-orbit interaction arising from the f and p orbitals. These spectroscopic information are subsequently used to infer (n, gamma) reaction rates in the Ar isotopic chain.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Conference or Workshop Item
Conference or workshop item Subtype:Conference Paper
Publisher:SIF and Springer-Verlag
ISBN:978-3-540-32843-8 ; 978-3-540-32842-1
Note:Publication type according to Uni Basel Research Database: Conference paper
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Last Modified:23 May 2014 08:34
Deposited On:22 Mar 2012 13:57

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