Physics Letters B (Dec 2014)
Neutron occupancy of the 0d5/2 orbital and the N=16 shell closure in 24O
- K. Tshoo,
- Y. Satou,
- C.A. Bertulani,
- H. Bhang,
- S. Choi,
- T. Nakamura,
- Y. Kondo,
- S. Deguchi,
- Y. Kawada,
- Y. Nakayama,
- K.N. Tanaka,
- N. Tanaka,
- Y. Togano,
- N. Kobayashi,
- N. Aoi,
- M. Ishihara,
- T. Motobayashi,
- H. Otsu,
- H. Sakurai,
- S. Takeuchi,
- K. Yoneda,
- F. Delaunay,
- J. Gibelin,
- F.M. Marqués,
- N.A. Orr,
- T. Honda,
- T. Kobayashi,
- T. Sumikama,
- Y. Miyashita,
- K. Yoshinaga,
- M. Matsushita,
- S. Shimoura,
- D. Sohler,
- J.W. Hwang,
- T. Zheng,
- Z.H. Li,
- Z.X. Cao
Affiliations
- K. Tshoo
- Rare Isotope Science Project, Institute for Basic Science, Daejeon 305-811, Republic of Korea; Corresponding author.
- Y. Satou
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Republic of Korea
- C.A. Bertulani
- Texas A & M University-Commerce, PO Box 3011, Commerce, Texas 75429, USA
- H. Bhang
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Republic of Korea
- S. Choi
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Republic of Korea
- T. Nakamura
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
- Y. Kondo
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
- S. Deguchi
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
- Y. Kawada
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
- Y. Nakayama
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
- K.N. Tanaka
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
- N. Tanaka
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
- Y. Togano
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
- N. Kobayashi
- Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
- N. Aoi
- Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan
- M. Ishihara
- RIKEN Nishina Center, Saitama 351-0198, Japan
- T. Motobayashi
- RIKEN Nishina Center, Saitama 351-0198, Japan
- H. Otsu
- RIKEN Nishina Center, Saitama 351-0198, Japan
- H. Sakurai
- RIKEN Nishina Center, Saitama 351-0198, Japan
- S. Takeuchi
- RIKEN Nishina Center, Saitama 351-0198, Japan
- K. Yoneda
- RIKEN Nishina Center, Saitama 351-0198, Japan
- F. Delaunay
- LPC-Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, 14050 Caen cedex, France
- J. Gibelin
- LPC-Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, 14050 Caen cedex, France
- F.M. Marqués
- LPC-Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, 14050 Caen cedex, France
- N.A. Orr
- LPC-Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, 14050 Caen cedex, France
- T. Honda
- Department of Physics, Rikkyo University, Tokyo 171-8501, Japan
- T. Kobayashi
- Department of Physics, Tohoku University, Miyagi 980-8578, Japan
- T. Sumikama
- Department of Physics, Tohoku University, Miyagi 980-8578, Japan
- Y. Miyashita
- Department of Physics, Tokyo University of Science, Chiba 278-8510, Japan
- K. Yoshinaga
- Department of Physics, Tokyo University of Science, Chiba 278-8510, Japan
- M. Matsushita
- Center for Nuclear Study, University of Tokyo, Saitama 351-0198, Japan
- S. Shimoura
- Center for Nuclear Study, University of Tokyo, Saitama 351-0198, Japan
- D. Sohler
- Institute for Nuclear Research of the Hungarian Academy of Sciences, PO Box 51, H-4001 Debrecen, Hungary
- J.W. Hwang
- Department of Physics and Astronomy, Seoul National University, Seoul 151-742, Republic of Korea
- T. Zheng
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
- Z.H. Li
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
- Z.X. Cao
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
- Journal volume & issue
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Vol. 739
pp. 19 – 22
Abstract
One-neutron knockout from 24O leading to the first excited state in 23O has been measured for a proton target at a 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 the 22O fragment and emitted neutron. A sharp peak was found at Edecay=50±3 keV, corresponding to an excited state in 23O at 2.78±0.11 MeV, as observed in previous measurements. The longitudinal momentum distribution for this state was consistent with d-wave neutron knockout, providing support for a Jπ assignment of 5/2+. The associated spectroscopic factor was deduced to be C2S(0d5/2)=4.1±0.4 by comparing the measured cross section (σ−1nexp=61±6 mb) with a distorted wave impulse approximation calculation. Such a large occupancy for the neutron 0d5/2 orbital is in line with the N=16 shell closure in 24O.
