# Study of $^{19}$C by One-Neutron Knockout from $^{20}$C

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.
Keywords :
Type de document :
Communication dans un congrès
ARIS 2014 - Advances in Radioactive Isotope Science, Jun 2014, Tokyo, Japan. JPS Conference Proceedings, 6, pp.030032, 2015, 〈10.7566/JPSCP.6.030032〉

http://hal.in2p3.fr/in2p3-01198949
Contributeur : Michel Lion <>
Soumis le : lundi 14 septembre 2015 - 16:25:37
Dernière modification le : lundi 5 février 2018 - 09:54:01

### Citation

Jongwon Hwang, Sunji Kim, Yoshiteru Satou, Nigel A. Orr, Takashi Nakamura, et al.. Study of $^{19}$C by One-Neutron Knockout from $^{20}$C. ARIS 2014 - Advances in Radioactive Isotope Science, Jun 2014, Tokyo, Japan. JPS Conference Proceedings, 6, pp.030032, 2015, 〈10.7566/JPSCP.6.030032〉. 〈in2p3-01198949〉

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