How Different is the Core of ^{25}F from ^{24}O_{g.s.} ?

T L Tang^{1

2}, T Uesaka², S Kawase¹, D Beaumel³, M Dozono², T Fujii¹, N Fukuda², T Fukunaga⁴, A Galindo-Uribarri⁵, S H Hwang⁶, N Inabe², D Kameda², T Kawahara⁷, W Kim⁶, K Kisamori¹, M Kobayashi¹, T Kubo², Y Kubota¹, K Kusaka², C S Lee¹, Y Maeda⁸, H Matsubara², S Michimasa¹, H Miya¹, T Noro⁴, A Obertelli^{2

9}, K Ogata^{10

11}, S Ota¹, E Padilla-Rodal¹², S Sakaguchi⁴, H Sakai², M Sasano², S Shimoura¹, S S Stepanyan⁶, H Suzuki², M Takaki¹, H Takeda², H Tokieda¹, T Wakasa⁴, T Wakui¹³, K Yako¹, Y Yanagisawa², J Yasuda⁴, R Yokoyama¹, K Yoshida², K Yoshida¹⁰, J Zenihiro²

Affiliations

¹ Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
² RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
³ Institut de physique nucléaire d'Orsay, 91406 Orsay, France.
⁴ Kyushu University, 6-10-1 Hakozaki, Higashi, Fukuoka 812-8581, Japan.
⁵ Oak Ridge National Laboratory, 1 Bethel Valley Rd, Oak Ridge, Tennessee 37831, USA.
⁶ Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Republic of Korea.
⁷ Toho University, 2-2-1 Miyama, Funabashi-shi, Chiba 274-8510, Japan.
⁸ University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki 889-2192, Japan.
⁹ IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
¹⁰ RCNP, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
¹¹ Department of Physics, Osaka City University, Osaka 558-8585, Japan.
¹² Universidad Nacional Autónoma de México, Instituto de Ciencias Nucleares, AP 70-543, México City 04510, DF, México.
¹³ CYRIC, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan.

PMID: 32530645
DOI: 10.1103/PhysRevLett.124.212502

How Different is the Core of ^{25}F from ^{24}O_{g.s.} ?

T L Tang et al. Phys Rev Lett. 2020.

. 2020 May 29;124(21):212502.

doi: 10.1103/PhysRevLett.124.212502.

Authors

Affiliations

¹ Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
² RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
³ Institut de physique nucléaire d'Orsay, 91406 Orsay, France.
⁴ Kyushu University, 6-10-1 Hakozaki, Higashi, Fukuoka 812-8581, Japan.
⁵ Oak Ridge National Laboratory, 1 Bethel Valley Rd, Oak Ridge, Tennessee 37831, USA.
⁶ Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Republic of Korea.
⁷ Toho University, 2-2-1 Miyama, Funabashi-shi, Chiba 274-8510, Japan.
⁸ University of Miyazaki, 1-1 Gakuen Kibanadai-nishi, Miyazaki 889-2192, Japan.
⁹ IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
¹⁰ RCNP, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
¹¹ Department of Physics, Osaka City University, Osaka 558-8585, Japan.
¹² Universidad Nacional Autónoma de México, Instituto de Ciencias Nucleares, AP 70-543, México City 04510, DF, México.
¹³ CYRIC, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan.

PMID: 32530645
DOI: 10.1103/PhysRevLett.124.212502

Abstract

The structure of a neutron-rich ^{25}F nucleus is investigated by a quasifree (p,2p) knockout reaction at 270A MeV in inverse kinematics. The sum of spectroscopic factors of π0d_{5/2} orbital is found to be 1.0±0.3. However, the spectroscopic factor with residual ^{24}O 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 ^{24}O core of ^{25}F nucleus significantly differs from a free ^{24}O nucleus, and the core consists of ∼35% ^{24}O_{g.s.}. and ∼65% excited ^{24}O. The result may infer that the addition of the 0d_{5/2} proton considerably changes neutron structure in ^{25}F from that in ^{24}O, which could be a possible mechanism responsible for the oxygen dripline anomaly.

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How Different is the Core of ^{25}F from ^{24}O_{g.s.} ?

Affiliations

How Different is the Core of ^{25}F from ^{24}O_{g.s.} ?

Authors

Affiliations

Abstract