Shape coexistence at N=20 and N=28: Study of 0{sub 2}{sup +} states in {sup 34}Si and {sup 44}S

Journal Article · Thu Aug 14 04:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4893271· OSTI ID:22308432

Grévy, S.; Rotaru, F.; Negoita, F.; Borcea, C.; Borcea, R.; Buta, A.; Calinescu, S.; Petrone, C. ^[1]; Stanoiu, M. ^[2]; Mrazek, J.; Lukyanov, S. ^[3]; Penionzhkevich, Y.; Cáceres, L.; De Oliveira, F.; Force, C.; Lebhertz, D.; Sorlin, O.; Stodel, C. ^[4]; Thomas, J. C.; Chevrier, R. ^[5] ; others, and

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1. Centre d'Etudes Nucléaire de Bordeaux Gradignan, CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan Cedex (France)
2. Horia Hulubei National Institute for Physics and Nuclear Engineering, IFIN-HH, P.O.B. MG-6, 077125 Magurele (Romania)
3. Nuclear Physics Institute, AS CR, CZ-25068 Rez (Czech Republic)
4. FLNR, JINR, 141980 Dubna, Moscow region (Russian Federation)
5. Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM - CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5 (France)

It is well known that the nuclear shell structure changes for the most exotic nuclei. One of the consequences of this phenomenon is the modification of the 'classical' magic numbers, as experimentally observed at N = 20 and N = 28. Nevertheless, the mechanisms responsible for such changes are still under discussion and more experimental information is needed to better constrain the theoretical models. In these proceedings, we report on the discovery and the experimental study by precise spectroscopy experiments of the 0{sub 2}{sup +} state in {sup 34}Si and {sup 44}S. The {sup 34}Si is located between the magic spherical {sup 36}S and the deformed {sup 32}Mg, member of the so-called island of inversion, whereas {sup 44}S is located between the magic spherical {sup 48}Ca and the deformed {sup 42}Si. Therefore, the structure of these nuclei, and in particular the phenomenon of shape coexistence, is of crucial importance to understand how the intruder configurations progressively dominate the ground state structure of the most exotic nuclei at both N = 20 and N = 28.

• OSTI ID: 22308432
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1609; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 48
MAGIC NUCLEI
MAGNESIUM 32
NUCLEAR STRUCTURE
SILICON 34
SILICON 42
SPECTROSCOPY
SULFUR 36
SULFUR 44