Study of $^{19}$C by One-Neutron Knockout from $^{20}$C
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Jongwon Hwang
- Function : Author
Sunji Kim
- Function : Author
Yoshiteru Satou
- Function : Author
Takashi Nakamura
- Function : Author
Yosuke Kondo
- Function : Author
J. Gibelin
- Function : Author
- PersonId : 11987
- IdHAL : julien-gibelin
- ORCID : 0000-0001-6751-3714
- IdRef : 105736708
N.L. Achouri
- Function : Author
- PersonId : 940560
- ORCID : 0000-0003-4411-6796
- IdRef : 069739773
Thomas Aumann
- Function : Author
Hidetada Baba
- Function : Author
Franck Delaunay
- Function : Author
- PersonId : 740010
- IdHAL : franck-l-delaunay
- ORCID : 0000-0002-1703-2434
Pieter Doornenbal
- Function : Author
Naoki Fukuda
- Function : Author
Naohito Inabe
- Function : Author
Tadaaki Isobe
- Function : Author
Daisuke Kameda
- Function : Author
Daiki Kanno
- Function : Author
Nobuyuki Kobayashi
- Function : Author
Toshio Kobayashi
- Function : Author
Toshiyuki Kubo
- Function : Author
Jenny Lee
- Function : Author
Ryogo Minakata
- Function : Author
Tohru Motobayashi
- Function : Author
Daichi Murai
- Function : Author
Tetsuya Murakami
- Function : Author
Kotomi Muto
- Function : Author
Tomohiro Nakashima
- Function : Author
Noritsugu Nakatsuka
- Function : Author
Seijiro Nishi
- Function : Author
Shun Ogoshi
- Function : Author
Hideaki Otsu
- Function : Author
Hiromi Sato
- Function : Author
Yohei Shimizu
- Function : Author
Hiroshi Suzuki
- Function : Author
Kento Takahashi
- Function : Author
Hiroyuki Takeda
- Function : Author
Satoshi Takeuchi
- Function : Author
Ryuki Tanaka
- Function : Author
Yasuhiro Togano
- Function : Author
Adam G. Tuff
- Function : Author
Ken-Ichiro Yoneda
- Function : Author
Abstract
The present work aims at exploring neutron-unbound states of 19C via the one-neutron knockout reaction. The invariant mass measurement in inverse kinematics was carried out with a carbon target and a 20C secondary beam at 290 MeV/nucleon. The preliminary relative energy spectrum and the parallel momentum distribution of the system of 18C + n were reconstructed from the measured momenta of the 18C fragment and decayed neutron. A new resonance was observed at Erel = 2.3 MeV, which corresponds to the unbound state of 19C at Ex = 2.9 MeV. The parallel momentum distribution for this resonance suggests a spin-parity assignment of 1/2−. Additionally, two known states were seen at Ex = 0.6 and 1.4 MeV, consistent with the 5/2+1 and 5/2+2 states, respectively.