Reduction of the spin-orbit splittings at the N=28 shell closure

L. Gaudefroy, O. Sorlin, D. Beaumel, Y. Blumenfeld, Zs. S. Dombrádi, S. Fortier, S. Franchoo, M. Gélin, J. Gibelin, S. Grévy, F. Hammache, F. Ibrahim, K. W. Kemper, K. L. Kratz, S. M. Lukyanov, C. Monrozeau, L. Nalpas, F. Nowacki, A. N. Ostrowski, T. Otsuka & 12 others Yu E. Penionzhkevich, J. Piekarewicz, E. C. Pollacco, P. Roussel-Chomaz, E. Rich, J. A. Scarpaci, M. G. St. Laurent, D. Sohler, M. Stanoiu, T. Suzuki, E. Tryggestad, D. Verney

Research output: Contribution to journalArticle

110 Citations (Scopus)

Abstract

The N=28 shell closure has been investigated via the Ar46(d,p)Ar47 transfer reaction in inverse kinematics. Energies and spectroscopic factors of the neutron p3/2, p1/2, and f5/2 states in Ar47 were determined and compared to those of the Ca49 isotone. We deduced a reduction of the N=28 gap by 330(90) keV and spin-orbit weakenings of 10(2) and 45(10)% for the f and p states, respectively. Such large variations for the f and p spin-orbit splittings could be accounted for by the proton-neutron tensor force and by the density dependence of the spin-orbit interaction, respectively. This contrasts with the picture of the spin-orbit interaction as a surface term only.

Original languageEnglish
Article number092501
JournalPhysical Review Letters
Volume97
Issue number9
DOIs
Publication statusPublished - 2006

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spin-orbit interactions
closures
orbits
inverse kinematics
neutrons
tensors
protons
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Gaudefroy, L., Sorlin, O., Beaumel, D., Blumenfeld, Y., Dombrádi, Z. S., Fortier, S., ... Verney, D. (2006). Reduction of the spin-orbit splittings at the N=28 shell closure. Physical Review Letters, 97(9), [092501]. https://doi.org/10.1103/PhysRevLett.97.092501

Reduction of the spin-orbit splittings at the N=28 shell closure. / Gaudefroy, L.; Sorlin, O.; Beaumel, D.; Blumenfeld, Y.; Dombrádi, Zs. S.; Fortier, S.; Franchoo, S.; Gélin, M.; Gibelin, J.; Grévy, S.; Hammache, F.; Ibrahim, F.; Kemper, K. W.; Kratz, K. L.; Lukyanov, S. M.; Monrozeau, C.; Nalpas, L.; Nowacki, F.; Ostrowski, A. N.; Otsuka, T.; Penionzhkevich, Yu E.; Piekarewicz, J.; Pollacco, E. C.; Roussel-Chomaz, P.; Rich, E.; Scarpaci, J. A.; St. Laurent, M. G.; Sohler, D.; Stanoiu, M.; Suzuki, T.; Tryggestad, E.; Verney, D.

In: Physical Review Letters, Vol. 97, No. 9, 092501, 2006.

Research output: Contribution to journalArticle

Gaudefroy, L, Sorlin, O, Beaumel, D, Blumenfeld, Y, Dombrádi, ZS, Fortier, S, Franchoo, S, Gélin, M, Gibelin, J, Grévy, S, Hammache, F, Ibrahim, F, Kemper, KW, Kratz, KL, Lukyanov, SM, Monrozeau, C, Nalpas, L, Nowacki, F, Ostrowski, AN, Otsuka, T, Penionzhkevich, YE, Piekarewicz, J, Pollacco, EC, Roussel-Chomaz, P, Rich, E, Scarpaci, JA, St. Laurent, MG, Sohler, D, Stanoiu, M, Suzuki, T, Tryggestad, E & Verney, D 2006, 'Reduction of the spin-orbit splittings at the N=28 shell closure', Physical Review Letters, vol. 97, no. 9, 092501. https://doi.org/10.1103/PhysRevLett.97.092501
Gaudefroy, L. ; Sorlin, O. ; Beaumel, D. ; Blumenfeld, Y. ; Dombrádi, Zs. S. ; Fortier, S. ; Franchoo, S. ; Gélin, M. ; Gibelin, J. ; Grévy, S. ; Hammache, F. ; Ibrahim, F. ; Kemper, K. W. ; Kratz, K. L. ; Lukyanov, S. M. ; Monrozeau, C. ; Nalpas, L. ; Nowacki, F. ; Ostrowski, A. N. ; Otsuka, T. ; Penionzhkevich, Yu E. ; Piekarewicz, J. ; Pollacco, E. C. ; Roussel-Chomaz, P. ; Rich, E. ; Scarpaci, J. A. ; St. Laurent, M. G. ; Sohler, D. ; Stanoiu, M. ; Suzuki, T. ; Tryggestad, E. ; Verney, D. / Reduction of the spin-orbit splittings at the N=28 shell closure. In: Physical Review Letters. 2006 ; Vol. 97, No. 9.
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AU - Sorlin, O.

AU - Beaumel, D.

AU - Blumenfeld, Y.

AU - Dombrádi, Zs. S.

AU - Fortier, S.

AU - Franchoo, S.

AU - Gélin, M.

AU - Gibelin, J.

AU - Grévy, S.

AU - Hammache, F.

AU - Ibrahim, F.

AU - Kemper, K. W.

AU - Kratz, K. L.

AU - Lukyanov, S. M.

AU - Monrozeau, C.

AU - Nalpas, L.

AU - Nowacki, F.

AU - Ostrowski, A. N.

AU - Otsuka, T.

AU - Penionzhkevich, Yu E.

AU - Piekarewicz, J.

AU - Pollacco, E. C.

AU - Roussel-Chomaz, P.

AU - Rich, E.

AU - Scarpaci, J. A.

AU - St. Laurent, M. G.

AU - Sohler, D.

AU - Stanoiu, M.

AU - Suzuki, T.

AU - Tryggestad, E.

AU - Verney, D.

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