Exclusive quasi-free proton knockout from oxygen isotopes at intermediate energies

Shoichiro Kawase , Tomohiro Uesaka , Tsz Leung Tang , Didier Beaumel (1) , Masanori Dozono , Taku Fukunaga , Toshihiko Fujii , Naoki Fukuda , Alfredo Galindo-Uribarri , Sanghoon Hwang , Naoto Inabe , Takahiro Kawabata , Tomomi Kawahara , Wooyoung Kim , Keiichi Kisamori , Motoki Kobayashi , Toshiyuki Kubo , Yuki Kubota , Kensuke Kusaka , Cheongsoo Lee , Yukie Maeda , Hiroaki Matsubara , Shin'Ichiro Michimasa , Hiroyuki Miya , Tetsuo Noro , Yuki Nozawa , Alexandre Obertelli (2) , Kazuyuki Ogata , Shinsuke Ota , Elizabeth Padilla-Rodal , Satoshi Sakaguchi , Hideyuki Sakai , Masaki Sasano , Susumu Shimoura , Samvel Stepanyan , Hiroshi Suzuki , Tomokazu Suzuki , Motonobu Takaki , Hiroyuki Takeda , Atsushi Tamii , Hiroshi Tokieda , Tomotsugu Wakasa , Takashi Wakui , Kentaro Yako , Jumpei Yasuda , Yoshiyuki Yanagisawa , Rin Yokoyama , Kazuki Yoshida , Koichi Yoshida , Juzo Zenihiro

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

The dependence of the single-particle strength on the difference between proton and neutron separation energies is studied for oxygen isotopes in a wide range of isospins. The cross sections of the quasi-free (p, 2p) reaction on 14,16,18,22,24O were measured at intermediate energies. The measured cross sections are compared to predictions based on the distorted wave impulse approximation and shell-model psd valence-space spectroscopic factors. The reduction factors, which are the ratio of the experimental cross sections to the theoretical predictions, show no apparent dependence on the proton–neutron separation energy difference. The result is compatible with the result of the (e, e p) reaction on stable targets and with the predictions of recent ab initio calculations.

Mots clés: D13 Stable and unstable nuclei; D27 Reactions induced by unstable nuclei

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

Shoichiro Kawase, Tomohiro Uesaka, Tsz Leung Tang, Didier Beaumel, Masanori Dozono, et al.. Exclusive quasi-free proton knockout from oxygen isotopes at intermediate energies. PTEP, 2018, 2018 (2), pp.021D01. ⟨10.1093/ptep/pty011⟩. ⟨hal-01763478⟩