Evolution of single-particle strength in neutron-rich $^{71}$Cu

P. Morfouace (1) , S. Franchoo (1) , K. Sieja (2) , I. Matea (1) , L. Nalpas (3) , M. Niikura (1) , A.M. Sánchez-Benítez , I. Stefan (1) , M. Assié (1) , F. Azaiez (1) , D. Beaumel (1) , S. Boissinot (3) , C. Borcea , R. Borcea , G. Burgunder (4) , L. Caceres (4) , N. de Séréville (1) , Zs. Dombrádi , J. Elseviers , B. Fernández-Domínguez (5) , A. Gillibert (3) , S. Giron (1) , S. Grévy (6) , F. Hammache (1) , O. Kamalou (4) , V. Lapoux (3) , L. Lefebvre (1) , A. Lepailleur (4) , C. Louchart (3) , G. Marquinez-Duran , I. Martel , A. Matta (1) , D. Mengoni , D.R. Napoli , F. Recchia , J.-A. Scarpaci (7) , D. Sohler , O. Sorlin (4) , M. Stanoiu , C. Stodel (4) , J.C. Thomas (4) , Zs. Vajta

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 IPHC - Institut Pluridisciplinaire Hubert Curien
3 DPHN - Département de Physique Nucléaire (ex SPhN)
4 GANIL - Grand Accélérateur National d'Ions Lourds
5 USC - Universidade de Santiago de Compostela [Spain]
6 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
7 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière

The strength functions of the πf5/2πf5/2, πp3/2πp3/2 and πf7/2πf7/2 orbitals in neutron-rich 71Cu were obtained in a 72Zn(d,3He)71Cu proton pick-up reaction in inverse kinematics using a radioactive beam of 72Zn at 38 MeV/u. A dedicated set-up was developed to overcome the experimental challenges posed by the low cross section of the reaction and the low energy of the outgoing 3He particles. The excitation-energy spectrum was reconstructed and spectroscopic factors were obtained after analysis of the angular distributions with the finite-range Distorted-Wave Born Approximation (DWBA). The results show that unlike for the πf5/2πf5/2 orbital and contrary to earlier interpretation, the πf7/2πf7/2 single-particle strength distribution is not appreciably affected by the addition of neutrons beyond N=40N=40.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

P. Morfouace, S. Franchoo, K. Sieja, I. Matea, L. Nalpas, et al.. Evolution of single-particle strength in neutron-rich $^{71}$Cu. Physics Letters B, 2015, 751, pp.306-310. ⟨10.1016/j.physletb.2015.10.064⟩. ⟨in2p3-01229910⟩