Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session EM: Nuclear Structure A=6-20 Part II
7:00 PM–9:30 PM,
Thursday, October 25, 2018
Hilton
Room: Queen's 6
Chair: Frederic Sarazin, Colorado School of Mines
Abstract ID: BAPS.2018.HAW.EM.6
Abstract: EM.00006 : Study of 19C using single-nucleon knockout*
8:15 PM–8:30 PM
Presenter:
Jongwon W Hwang
(Department of Physics and Astronomy, Seoul National University)
Authors:
Jongwon W Hwang
(Department of Physics and Astronomy, Seoul National University)
Sunji Kim
(Department of Physics and Astronomy, Seoul National University)
Yoshiteru Satou
(Department of Physics and Astronomy, Seoul National University)
Nigel A Orr
(LPC-Caen, IN2P3/CNRS, ENSICAEN, UNICAEN et Normandie Université)
Takashi Nakamura
(Department of Physics, Tokyo Institute of Technology)
Yosuke Kondo
(Department of Physics, Tokyo Institute of Technology)
SAMURAI Dayone Collaboration
(RIKEN Nishina Center)
For decades, the p-sd-shell nuclei have been a useful tool to study shell evolution toward the dripline. The spectroscopic study of 19C, a one-neutron halo near the neutron dripline, is an important testing ground for the recent shell-model interactions in the p-sd shell space, especially for neutron-rich nuclei.
The unbound states of 19C were studied using single-nucleon knockout at RIBF, RIKEN. 19C was produced from 20C (20N) beam by one neutron (proton) knockout. The relative energy spectra and parallel momentum distributions were reconstructed by detecting all decay products, 18C and a neutron, using the SAMURAI spectrometer and NEBULA neutron array.
As a result, 5/2+1 was confirmed to locate just above S1n and 1/2-1 was also discovered in the neutron-knockout channel. Additional high-lying resonance over S3n was observed in the proton-knockout channel, which might involve a proton-excited 18C core. In this talk, the details of observed states and the discussion in the context of shell-model calculations will be reported.
*This work was in part supported by the WCU (R32-2008-000-10155-0) and the GPF (NRF-2011-0006492) programs of NRF Korea, JSPS KAKENHI Grant Number 16H02179 and MEXT KAKENHI Grant Number 24105005 in Japan, and the French ANR grant EXPAND (ANR-14-CE33-0022-01).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.EM.6
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