How Different is the Core of F 25 from O g. s. 24 ?

T. L. Tang; T. Uesaka; S. Kawase; D. Beaumel; M. Dozono; T. Fujii; N. Fukuda; T. Fukunaga; A. Galindo-Uribarri; S. H. Hwang; N. Inabe; D. Kameda; T. Kawahara; W. Kim; K. Kisamori; M. Kobayashi; T. Kubo; Y. Kubota; K. Kusaka; C. S. Lee; Y. Maeda; H. Matsubara; S. Michimasa; H. Miya; T. Noro; A. Obertelli; K. Ogata; S. Ota; E. Padilla-Rodal; S. Sakaguchi; H. Sakai; M. Sasano; S. Shimoura; S. S. Stepanyan; H. Suzuki; M. Takaki; H. Takeda; H. Tokieda; T. Wakasa; T. Wakui; K. Yako; Y. Yanagisawa; J. Yasuda; R. Yokoyama; K. Yoshida; K. Yoshida; J. Zenihiro

doi:10.1103/PhysRevLett.124.212502

How Different is the Core of F 25 from O g. s. 24 ?

T. L. Tang, T. Uesaka, S. Kawase, D. Beaumel, M. Dozono, T. Fujii, N. Fukuda, T. Fukunaga, A. Galindo-Uribarri, S. H. Hwang, N. Inabe, D. Kameda, T. Kawahara, W. Kim, K. Kisamori, M. Kobayashi, T. Kubo, Y. Kubota, K. Kusaka, C. S. LeeY. Maeda, H. Matsubara, S. Michimasa, H. Miya, T. Noro, A. Obertelli, K. Ogata, S. Ota, E. Padilla-Rodal, S. Sakaguchi, H. Sakai, M. Sasano, S. Shimoura, S. S. Stepanyan, H. Suzuki, M. Takaki, H. Takeda, H. Tokieda, T. Wakasa, T. Wakui, K. Yako, Y. Yanagisawa, J. Yasuda, R. Yokoyama, K. Yoshida, K. Yoshida, J. Zenihiro

Neutrino Research

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Abstract

The structure of a neutron-rich F25 nucleus is investigated by a quasifree (p,2p) knockout reaction at 270A MeV in inverse kinematics. The sum of spectroscopic factors of π0d5/2 orbital is found to be 1.0±0.3. However, the spectroscopic factor with residual O24 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 O24 core of F25 nucleus significantly differs from a free O24 nucleus, and the core consists of ∼35% O24g.s.. and ∼65% excited O24. The result may infer that the addition of the 0d5/2 proton considerably changes neutron structure in F25 from that in O24, which could be a possible mechanism responsible for the oxygen dripline anomaly.

Original language	English
Article number	212502
Journal	Physical Review Letters
Volume	124
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.124.212502
State	Published - May 29 2020

Funding

The authors thank the staffs at the RIKEN Nishina Center and Center for Nuclear Study, Tokyo University, for operating the accelerators and ion source during the experiment. The first author (T. L. T.) is grateful for above institutes and all the support from Research Center of Nuclear Physics, Osaka University. This work was supported by the RIKEN Nishina Center (Grant No. NP1006-SHARAQ04), Center for Nuclear Study, University of Tokyo, scholarship of Japanese Government (Monbukagakusho), and by Oak Ridge National Laboratory under Contract No. DE-AC05-00OR22725. The authors thank the staffs at the RIKEN Nishina Center and Center for Nuclear Study, Tokyo University, for operating the accelerators and ion source during the experiment. The first author (T.L.T.) is grateful for above institutes and all the support from Research Center of Nuclear Physics, Osaka University. This work was supported by the RIKEN Nishina Center (Grant No.?NP1006-SHARAQ04), Center for Nuclear Study, University of Tokyo, scholarship of Japanese Government (Monbukagakusho), and by Oak Ridge National Laboratory under Contract No.?DE-AC05-00OR22725.

Funders	Funder number
RIKEN Nishina Center	NP1006-SHARAQ04
Oak Ridge National Laboratory	DE-AC05-00OR22725
University of Tokyo

Access to Document

10.1103/PhysRevLett.124.212502

Cite this

Tang, T. L., Uesaka, T., Kawase, S., Beaumel, D., Dozono, M., Fujii, T., Fukuda, N., Fukunaga, T., Galindo-Uribarri, A., Hwang, S. H., Inabe, N., Kameda, D., Kawahara, T., Kim, W., Kisamori, K., Kobayashi, M., Kubo, T., Kubota, Y., Kusaka, K., ... Zenihiro, J. (2020). How Different is the Core of F 25 from O g. s. 24 ? Physical Review Letters, 124(21), Article 212502. https://doi.org/10.1103/PhysRevLett.124.212502

@article{ed4e066a31344917b4ec9f4b6ab07a7d,

title = "How Different is the Core of F 25 from O g. s. 24 ?",

abstract = "The structure of a neutron-rich F25 nucleus is investigated by a quasifree (p,2p) knockout reaction at 270A MeV in inverse kinematics. The sum of spectroscopic factors of π0d5/2 orbital is found to be 1.0±0.3. However, the spectroscopic factor with residual O24 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 O24 core of F25 nucleus significantly differs from a free O24 nucleus, and the core consists of ∼35% O24g.s.. and ∼65% excited O24. The result may infer that the addition of the 0d5/2 proton considerably changes neutron structure in F25 from that in O24, which could be a possible mechanism responsible for the oxygen dripline anomaly.",

author = "Tang, {T. L.} and T. Uesaka and S. Kawase and D. Beaumel and M. Dozono and T. Fujii and N. Fukuda and T. Fukunaga and A. Galindo-Uribarri and Hwang, {S. H.} and N. Inabe and D. Kameda and T. Kawahara and W. Kim and K. Kisamori and M. Kobayashi and T. Kubo and Y. Kubota and K. Kusaka and Lee, {C. S.} and Y. Maeda and H. Matsubara and S. Michimasa and H. Miya and T. Noro and A. Obertelli and K. Ogata and S. Ota and E. Padilla-Rodal and S. Sakaguchi and H. Sakai and M. Sasano and S. Shimoura and Stepanyan, {S. S.} and H. Suzuki and M. Takaki and H. Takeda and H. Tokieda and T. Wakasa and T. Wakui and K. Yako and Y. Yanagisawa and J. Yasuda and R. Yokoyama and K. Yoshida and K. Yoshida and J. Zenihiro",

note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society..",

year = "2020",

month = may,

day = "29",

doi = "10.1103/PhysRevLett.124.212502",

language = "English",

volume = "124",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Tang, TL, Uesaka, T, Kawase, S, Beaumel, D, Dozono, M, Fujii, T, Fukuda, N, Fukunaga, T, Galindo-Uribarri, A, Hwang, SH, Inabe, N, Kameda, D, Kawahara, T, Kim, W, Kisamori, K, Kobayashi, M, Kubo, T, Kubota, Y, Kusaka, K, Lee, CS, Maeda, Y, Matsubara, H, Michimasa, S, Miya, H, Noro, T, Obertelli, A, Ogata, K, Ota, S, Padilla-Rodal, E, Sakaguchi, S, Sakai, H, Sasano, M, Shimoura, S, Stepanyan, SS, Suzuki, H, Takaki, M, Takeda, H, Tokieda, H, Wakasa, T, Wakui, T, Yako, K, Yanagisawa, Y, Yasuda, J, Yokoyama, R, Yoshida, K, Yoshida, K & Zenihiro, J 2020, 'How Different is the Core of F 25 from O g. s. 24 ?', Physical Review Letters, vol. 124, no. 21, 212502. https://doi.org/10.1103/PhysRevLett.124.212502