Unbound states in 17C and p-sd shell-model interactions
Abstract
Unbound states in 17C were investigated via one-neutron removal from a 18C beam at an energy of 245 MeV/nucleon on a carbon target. The energy spectrum of 17C, above the single-neutron decay threshold, was reconstructed using invariant mass spectroscopy from the measured momenta of the 16C fragment and neutron, and was found to exhibit resonances at Er=0.52(2), 0.77(2), 1.36(1), 1.91(1), 2.22(3) and 3.20(1) MeV. The resonance at Er=0.77(2) MeV [Ex=1.51(3) MeV] was provisionally assigned as the second 5/2+ state. The two resonances at Er=1.91(1) and 3.20(1) MeV [Ex=2.65(2) and 3.94(2) MeV] were identified, through comparison of the energies, cross sections and momentum distributions with shell-model and eikonal reaction calculations, as p-shell hole states with spin-parities 1/2- and 3/2-, respectively. A detailed comparison was made with the results obtained using a range of shell-model interactions. The YSOX shell-model Hamiltonian, the cross-shell part of which is based on the monopole-based universal interaction, was found to provide a very good description of the present results and those for the neighbouring odd-A carbon isotopes - in particular for the negative parity cross-shell states.
Cite
@article{arxiv.2212.12997,
title = {Unbound states in 17C and p-sd shell-model interactions},
author = {Sunji Kim and Jongwon Hwang and Yoshiteru Satou and Nigel A. Orr and Takashi Nakamura and Yosuke Kondo and Julien Gibelin and Nadia Lynda Achouri and Thomas Aumann and Hidetada Baba and Franck Delaunay and Pieter Doornenbal and Naoki Fukuda and Naohito Inabe and Tadaaki Isobe and Daisuke Kameda and Daiki Kanno and Nobuyuki Kobayashi and Toshio Kobayashi and Toshiyuki Kubo and Sylvain Leblond and Jenny Lee and Francisco Miguel Marqués and Ryogo Minakata and Tohru Motobayashi and Daichi Murai and Tetsuya Murakami and Kotomi Muto and Tomohiro Nakashima and Noritsugu Nakatsuka and Alahari Navin and Seijiro Nishi and Shun Ogoshi and Hideaki Otsu and Hiromi Sato and Yohei Shimizu and Hiroshi Suzuki and Kento Takahashi and Hiroyuki Takeda and Satoshi Takeuchi and Ryuki Tanaka and Yasuhiro Togano and Adam G. Tuff and Marine Vandebrouck and Ken-ichiro Yoneda},
journal= {arXiv preprint arXiv:2212.12997},
year = {2023}
}
Comments
Physics Letters B 836 (2023) 137629, published