EPJ Web of Conferences
Volume 66, 2014INPC 2013 – International Nuclear Physics Conference
|Number of page(s)||4|
|Published online||20 March 2014|
Neutron occupancy of 0d5/2 orbital in 24O
1 RISP, Institute for Basic Science 70, Yusung-gu Daejeon 305-811, Korea
2 Department of Physics and Astronomy, Seoul National University, Seoul, 151-742, Korea
3 Department of Physics, Tokyo Institute of Technology, Tokyo, 152-8551, Japan
4 RIKEN Nishina Center, Saitama 351-0198, Japan
5 LPC-Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, 14050 Caen cedex, France
6 Department of Physics, Rikkyo University, Tokyo 171-8501, France
7 Department of Physics, Tohoku University, Aoba, Sendai Miyagi 980-8578, Japan
8 Department of Physics, Tokyo University of Science, Noda Chiba 278-8510, Japan
9 Center for Nuclear Study, University of Tokyo, Saitama 351-0198, Japan
10 Institute for Nuclear Research of the Hungarian Academy of Sciences, P.O.Box 51 H-4001 Debrecen, Hungary
11 School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 , China
12 Research Center for Nuclear Physics, Osaka University, Osaka 567-0047 , Japan
13 Department of Physics, University of Tokyo, Tokyo 113-0033 , Japan
a e-mail: firstname.lastname@example.org
Published online: 20 March 2014
The partial one-neutron removal cross section of 24O leading to the first excited state in 23O has been measured to be 65.7 ± 5.3 mb with a proton target in inverse kinematics at the beam energy of 62 MeV/nucleon. The decay energy spectrum of the neutron unbound state of 23O was reconstructed from the measured four momenta of 22O and the emitted neutron. A sharp peak was observed at Edecay = 48 ± 3 keV, confirming the previous measurements. The measured partial longitudinal momentum distribution of 23O* showed the d-wave knockout character, providing a support for the Jπ assignment of 5/2+ for this state. The spectroscopic factor for the neutrons in 0d5/2 orbital was deduced, for the first time, to be C2S(0d5/2) = 3.7 ± 0.3 (preliminary) by comparing with the result of Glauber model. The relatively large spectroscopic factor supports the N = 16 shell closure in the neutron drip-line nucleus 24O.
© Owned by the authors, published by EDP Sciences, 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Initial download of the metrics may take a while.