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Collapse of the N=28 Shell Closure in 42Si

Bastin, B., Grévy, S., Sohler, D., Sorlin, O., Dombrádi, Zs., Achouri, N. L., Angélique, J. C., Azaiez, F., Baiborodin, D., Borcea, R., Bourgeois, C., Buta, A., Bürger, A., Chapman, R., Dalouzy, J. C., Dlouhy, Z., Drouard, A., Elekes, Z., Franchoo, S., Iacob, S., Laurent, B., Lazar, M., Liang, X., Liénard, E., Mrazek, J., Nalpas, L., Negoita, F., Orr, N. A., Penionzhkevich, Y., Podolyák, Zs., Pougheon, F., Roussel-Chomaz, P., Saint-Laurent, M. G., Stanoiu, M., Stefan, I., Nowacki, F. and Poves, A. (2007) Collapse of the N=28 Shell Closure in 42Si Physical Review Letters, 99 (022503).

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Abstract

The energies of the excited states in very neutron-rich 42Si and 41,43P have been measured using in-beam gamma-ray spectroscopy from the fragmentation of secondary beams of 42,44S at 39A MeV. The low 2+ energy of 42Si, 770(19) keV, together with the level schemes of 41,43P, provides evidence for the disappearance of the Z=14 and N=28 spherical shell closures, which is ascribed mainly to the action of proton-neutron tensor forces. New shell model calculations indicate that 42Si is best described as a well-deformed oblate rotor.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmailORCID
Bastin, B.UNSPECIFIEDUNSPECIFIED
Grévy, S.UNSPECIFIEDUNSPECIFIED
Sohler, D.UNSPECIFIEDUNSPECIFIED
Sorlin, O.UNSPECIFIEDUNSPECIFIED
Dombrádi, Zs.UNSPECIFIEDUNSPECIFIED
Achouri, N. L.UNSPECIFIEDUNSPECIFIED
Angélique, J. C.UNSPECIFIEDUNSPECIFIED
Azaiez, F.UNSPECIFIEDUNSPECIFIED
Baiborodin, D.UNSPECIFIEDUNSPECIFIED
Borcea, R.UNSPECIFIEDUNSPECIFIED
Bourgeois, C.UNSPECIFIEDUNSPECIFIED
Buta, A.UNSPECIFIEDUNSPECIFIED
Bürger, A.UNSPECIFIEDUNSPECIFIED
Chapman, R.UNSPECIFIEDUNSPECIFIED
Dalouzy, J. C.UNSPECIFIEDUNSPECIFIED
Dlouhy, Z.UNSPECIFIEDUNSPECIFIED
Drouard, A.UNSPECIFIEDUNSPECIFIED
Elekes, Z.UNSPECIFIEDUNSPECIFIED
Franchoo, S.UNSPECIFIEDUNSPECIFIED
Iacob, S.UNSPECIFIEDUNSPECIFIED
Laurent, B.UNSPECIFIEDUNSPECIFIED
Lazar, M.UNSPECIFIEDUNSPECIFIED
Liang, X.UNSPECIFIEDUNSPECIFIED
Liénard, E.UNSPECIFIEDUNSPECIFIED
Mrazek, J.UNSPECIFIEDUNSPECIFIED
Nalpas, L.UNSPECIFIEDUNSPECIFIED
Negoita, F.UNSPECIFIEDUNSPECIFIED
Orr, N. A.UNSPECIFIEDUNSPECIFIED
Penionzhkevich, Y.UNSPECIFIEDUNSPECIFIED
Podolyák, Zs.UNSPECIFIEDUNSPECIFIED
Pougheon, F.UNSPECIFIEDUNSPECIFIED
Roussel-Chomaz, P.UNSPECIFIEDUNSPECIFIED
Saint-Laurent, M. G.UNSPECIFIEDUNSPECIFIED
Stanoiu, M.UNSPECIFIEDUNSPECIFIED
Stefan, I.UNSPECIFIEDUNSPECIFIED
Nowacki, F.UNSPECIFIEDUNSPECIFIED
Poves, A.UNSPECIFIEDUNSPECIFIED
Date : 12 July 2007
Identification Number : 10.1103/PhysRevLett.99.022503
Additional Information : Published in Physical Review Letters, 99, 022503 (2007). © 2007 The American Physical Society.
Depositing User : Mr Adam Field
Date Deposited : 27 May 2010 14:08
Last Modified : 23 Sep 2013 18:27
URI: http://epubs.surrey.ac.uk/id/eprint/309

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