Spectroscopy of nuclei around $^{100}$Sn populated via two-neutron knockout reactions

A. Corsi (1) , A. Obertelli (1) , P. Doornenbal , F. Nowacki (2) , H. Sagawa , Y. Tanimura (3) , N. Aoi , H. Baba , P. Bednarczyk , S. Boissinot (1) , M. Ciemala , A. Gillibert (1) , T. Isobe , A. Jungclaus , V. Lapoux (1) , J. Lee , K. Matsui , M. Matsushita , T. Motobayashi , D. Nishimura , S. Ota , E. Pollacco (1) , H. Sakurai , C. Santamaria (1) , Y. Shiga , D. Sohler , D. Steppenbeck , S. Takeuchi , R. Taniuchi , H. Wang

1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 IPHC - Institut Pluridisciplinaire Hubert Curien
3 IPNO - Institut de Physique Nucléaire d'Orsay

We report on the in-beam gamma spectroscopy of Sn102 and Cd100 produced via two-neutron removal from carbon and CH2 targets at about 150 MeV/nucleon beam energy. New transitions assigned to the decay of a second 2+ excited state at 2470(60) keV in Sn102 were observed. Two-neutron removal cross sections from Sn104 and Cd102 have been extracted. The enhanced cross section to the 22+ in Sn102 populated via the (p,p2n) reaction is traced back to an increase of shell-model structure overlaps, consistent with the hypothesis that the proton-induced two-deeply bound-nucleon removal mechanism is of direct nature.

Mots clés: 21.10.Pc; 25.60.Dz

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

A. Corsi, A. Obertelli, P. Doornenbal, F. Nowacki, H. Sagawa, et al.. Spectroscopy of nuclei around $^{100}$Sn populated via two-neutron knockout reactions. Phys.Rev.C, 2018, 97 (4), pp.044321. ⟨10.1103/PhysRevC.97.044321⟩. ⟨hal-01792253⟩