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

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arxiv 1804.07360 v1 pith:3OAPMKMI submitted 2018-04-19 nucl-ex

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

We report on the in-beam gamma spectroscopy of $^{102}$Sn and $^{100}$Cd produced via two-neutron removal from carbon and CH$_2$ 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 $^{102}$Sn were observed. Two-neutron removal cross sections from $^{104}$Sn and $^{102}$Cd have been extracted. The enhanced cross section to the 2$^+_2$ in $^{102}$Sn 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.

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