| Autor: |
Y. Kawada, Y. Nakayama, Dóra Sohler, H. Bhang, N. A. Orr, Carlos A. Bertulani, T. Zheng, K. Tshoo, F. Delaunay, Masafumi Matsushita, Satoshi Takeuchi, Jongwon Hwang, Kenichiro Yoneda, N. Tanaka, T. Honda, T. Kobayashi, S. Deguchi, N. Kobayashi, Z X Cao, Takashi Nakamura, Susumu Shimoura, Hideaki Otsu, Nori Aoi, S. Choi, J. Gibelin, Tohru Motobayashi, Kanenobu Tanaka, Yasuhiro Togano, Hiroyoshi Sakurai, F M Marques, K. Yoshinaga, Z. H. Li, Yosuke Kondo, M. Ishihara, Y. Miyashita, Y. Satou, Toshiyuki Sumikama |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Physics Letters B. 739:19-22 |
| ISSN: |
0370-2693 |
| DOI: |
10.1016/j.physletb.2014.10.033 |
| Popis: |
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 E decay = 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 J π assignment of 5 / 2 + . The associated spectroscopic factor was deduced to be C 2 S ( 0 d 5 / 2 ) = 4.1 ± 0.4 by comparing the measured cross section ( σ − 1 n exp = 61 ± 6 mb ) with a distorted wave impulse approximation calculation. Such a large occupancy for the neutron 0 d 5 / 2 orbital is in line with the N = 16 shell closure in 24O. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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