Reduction of the Spin-Orbit Splittings at the N=28 Shell Closure

L. Gaudefroy; O. Sorlin; D. Beaumel; Y. Blumenfeld; Z. 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; Yu.-E. Penionzhkevich; J. Piekarewicz; E.C. Pollacco; P. Roussel-Chomaz; E. Rich; J. A. Scarpaci; M.G. Saint-Laurent; D. Sohler; M. Stanoiu; T. Suzuki; E. Tryggestad; D. Verney

doi:10.1103/PhysRevLett.97.092501

Journal Articles Physical Review Letters Year : 2006

Reduction of the Spin-Orbit Splittings at the N=28 Shell Closure

(1, 2) , (1, 2) , (1) , (1) , , (1) , (1) , (2) , (1) , (2) , (1) , (1) , , , , (1) , (3) , (4) , , , , , (3) , (2) , (1) , (1) , (2) , , , , (1) , (1)

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2
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4

L. Gaudefroy

Function : Author

Institut de Physique Nucléaire d'Orsay

Grand Accélérateur National d'Ions Lourds

O. Sorlin

Function : Author

Institut de Physique Nucléaire d'Orsay

Grand Accélérateur National d'Ions Lourds

D. Beaumel

Function : Author

Institut de Physique Nucléaire d'Orsay

Y. Blumenfeld

Function : Author

Institut de Physique Nucléaire d'Orsay

Z. Dombrádi

Function : Author

S. Fortier

Function : Author

Institut de Physique Nucléaire d'Orsay

S. Franchoo

Function : Author

Institut de Physique Nucléaire d'Orsay

M. Gélin

Function : Author

Grand Accélérateur National d'Ions Lourds

J. Gibelin

Function : Author
PersonId : 11987
IdHAL : julien-gibelin
ORCID : 0000-0001-6751-3714
IdRef : 105736708

Institut de Physique Nucléaire d'Orsay

S. Grévy

Function : Author

Grand Accélérateur National d'Ions Lourds

F. Hammache

Function : Author

Institut de Physique Nucléaire d'Orsay

F. Ibrahim

Function : Author

Institut de Physique Nucléaire d'Orsay

K. W. Kemper

Function : Author

K.-L. Kratz

Function : Author

S. M. Lukyanov

Function : Author

C. Monrozeau

Function : Author

Institut de Physique Nucléaire d'Orsay

L. Nalpas

Function : Author

Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée

F. Nowacki

Function : Author
PersonId : 748924
IdHAL : frederic-nowacki
ORCID : 0000-0002-7854-8717

Département Recherches Subatomiques

A. N. Ostrowski

Function : Author

T. Otsuka

Function : Author

Yu.-E. Penionzhkevich

Function : Author

J. Piekarewicz

Function : Author

E.C. Pollacco

Function : Author

Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée

P. Roussel-Chomaz

Function : Author
PersonId : 903877

Grand Accélérateur National d'Ions Lourds

E. Rich

Function : Author

Institut de Physique Nucléaire d'Orsay

J. A. Scarpaci

Function : Author
PersonId : 742300
IdHAL : jean-antoine-scarpaci
IdRef : 087196514

Institut de Physique Nucléaire d'Orsay

M.G. Saint-Laurent

Function : Author

Grand Accélérateur National d'Ions Lourds

D. Sohler

Function : Author
PersonId : 755248
ORCID : 0000-0002-9250-135X

M. Stanoiu

Function : Author

T. Suzuki

Function : Author

E. Tryggestad

Function : Author

Institut de Physique Nucléaire d'Orsay

D. Verney

Function : Author

Institut de Physique Nucléaire d'Orsay

Abstract

The N=28 shell closure has been investigated via the 46Ar(d,p)47Ar transfer reaction in inverse kinematics. Energies and spectroscopic factors of the neutron p3/2, p1/2, and f5/2 states in 47Ar were determined and compared to those of the 49Ca 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.

Keywords

2H-induced transfer reactions Nuclear spectroscopic factors Nuclear single-particle levels and strength functions Properties of nuclei with 39 <= A <= 58

Domains

Nuclear Experiment [nucl-ex]

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https://in2p3.hal.science/in2p3-00090839

Submitted on : Monday, September 4, 2006-9:47:41 AM

Last modification on : Thursday, April 11, 2024-1:18:11 PM

Dates and versions

in2p3-00090839 , version 1 (04-09-2006)

Identifiers

HAL Id : in2p3-00090839 , version 1
DOI : 10.1103/PhysRevLett.97.092501

Cite

L. Gaudefroy, O. Sorlin, D. Beaumel, Y. Blumenfeld, Z. Dombrádi, et al.. Reduction of the Spin-Orbit Splittings at the N=28 Shell Closure. Physical Review Letters, 2006, 97, pp.092501. ⟨10.1103/PhysRevLett.97.092501⟩. ⟨in2p3-00090839⟩

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Reduction of the Spin-Orbit Splittings at the N=28 Shell Closure

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