Study of the neutron-rich isotope $^{46}$Ar through intermediate energy Coulomb excitation

S. Calinescu , L. Caceres , S. Grévy (1) , O. Sorlin (2) , D. Sohler , M. Stanoiu , F. Negoita , E. Clément (2) , R. Astabatyan , C. Borcea , R. Borcea , M. Bowry , W. Catford , Z. Dombradi , S. Franchoo (3) , R. Garcia , R. Gillibert , H. Guerin , J.C. Thomas (2) , I. Kuti , S. Lukyanov , A. Lepailleur (2) , V. Maslov , P. Morfouace (3) , J. Mrazek , M. Niikura , L. Perrot (3) , Z. Podolyak , C. Petronea , Y. Penionzhkevich , T. Roger (2) , F. Rotaru , I. Stefan (3) , Z. Vajta , E. Wilson

1 NEX - Noyaux exotiques
2 GANIL - Grand Accélérateur National d'Ions Lourds
3 IPNO - Institut de Physique Nucléaire d'Orsay

The preliminary value of the reduced transition probability B(E2; 0+ ! 2+1 ) in 46Ar has been determined using the Coulomb excitation technique at intermediate energy. The 46Ar was produced in the fragmentation of a 48Ca beam at GANIL. The -rays following the Coulomb excitation of the 2+1 were emitted in-flight and detected by the 64 BaF2 detectors of the Château de Cristal array. The relatively low B(E2) value of 46Ar reported in this article supports the semi-magic character of this nucleus due to the persistence of the N = 28 shell closure at Z = 18.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

S. Calinescu, L. Caceres, S. Grévy, O. Sorlin, D. Sohler, et al.. Study of the neutron-rich isotope $^{46}$Ar through intermediate energy Coulomb excitation. XXXIII Mazurian Lakes Conference on Physics, Sep 2013, Piaski, Poland. pp.199, ⟨10.5506/APhysPolB.45.199⟩. ⟨in2p3-00954485⟩