1. How Different is the Core of 25F from 24Og.s. ?
- Author
-
T., L. Tang (Univ. Tokyo, CNS), T., Uesaka (RIKEN), S., Kawase (Univ. Tokyo, CNS), D., Beaumel (Inst. Phys. Nucl. Orsay), M., Dozono (RIKEN), T., Fujii (Univ. Tokyo CNS), N., Fukuda (RIKEN), T., Fukunaga (Kyushu Univ.), A., Galindo-Uribarri (Oak Ridge Natl. Lab.), S., H. Hwang (Kyungpook Natl. Univ.), N., Inabe (RIKEN), D., Kameda (RIKEN), T., Kawahara (Toho Univ.), W., Kim ( Kyungpook Natl. Univ. ), K., Kisamori (Univ. Tokyo, CNS), M., Kobayashi (Univ. Tokyo, CNS), T., Kubo (RIKEN), Y., Kubota (Univ. Tokyo, CNS), K., Kusaka (RIKEN), C., S. Lee (Univ. Tokyo, CNS), Y., Maeda (Univ. Miyazaki), Wakui, Takashi, al., et, Takashi, Wakui, T., L. Tang (Univ. Tokyo, CNS), T., Uesaka (RIKEN), S., Kawase (Univ. Tokyo, CNS), D., Beaumel (Inst. Phys. Nucl. Orsay), M., Dozono (RIKEN), T., Fujii (Univ. Tokyo CNS), N., Fukuda (RIKEN), T., Fukunaga (Kyushu Univ.), A., Galindo-Uribarri (Oak Ridge Natl. Lab.), S., H. Hwang (Kyungpook Natl. Univ.), N., Inabe (RIKEN), D., Kameda (RIKEN), T., Kawahara (Toho Univ.), W., Kim ( Kyungpook Natl. Univ. ), K., Kisamori (Univ. Tokyo, CNS), M., Kobayashi (Univ. Tokyo, CNS), T., Kubo (RIKEN), Y., Kubota (Univ. Tokyo, CNS), K., Kusaka (RIKEN), C., S. Lee (Univ. Tokyo, CNS), Y., Maeda (Univ. Miyazaki), Wakui, Takashi, al., et, and Takashi, Wakui
- Abstract
The structure of a neutron-rich F-25 nucleus is investigated by a quasifree (p, 2p) knockout reaction at 270A MeV in inverse kinematics. The sum of spectroscopic factors of pi 0d(5/2) orbital is found to be 1.0 +/- 0.3. However, the spectroscopic factor with residual O-24 nucleus being in the ground state is found to be only 0.36 +/- 0.13, while those in the excited state is 0.65 +/- 0.25. The result shows that the O-24 core of F-25 nucleus significantly differs from a free O-24 nucleus, and the core consists of similar to 35% O-24(g.s.). and similar to 65% excited O-24. The result may infer that the addition of the 0d(5/2) proton considerably changes neutron structure in F-25 from that in O-24, which could be a possible mechanism responsible for the oxygen dripline anomaly.
- Published
- 2020