<sup>26</sup>Si + α resonant scattering measurement for the astrophysical <sup>26</sup>Si(α, p)<sup>29</sup>P reaction rate

ORAL

Abstract

The 26Si(α, p)29P reaction is considered to have astrophysical importance such as impact on X-ray burst light curves, or on the abundance of 26Al known as a galactic gamma ray source. The cross section of this reaction has, however, never been measured directly, and there was only a study of 30S resonances via limited information from the 28Si(3He, n)30S and 32S(p, t)30S reactions. We have performed both the 26Si(α, p)29P reaction direct measurement and the 26Si(α, α)26Si resonant scattering measurement in inverse kinematics to determine the reaction cross section at higher energies and to obtain alpha resonance information in the 30S compound system, respectively. The experiment employed the thick-gas-target inverse-kinematics method with a 26Si radioactive isotope (RI) produced at the Center-for-the-Nuclear-Study RI Beam Separator (CRIB) of the University of Tokyo. In the presentation, we will discuss the α resonant scattering result, which covers the excitation energy range of Ex = 12–16 MeV and was analyzed by R-matrix fit, to update the 26Si(α, p)29P thermal reaction rate.

*This work was supported by JSPS KAKENHI No. 18K13556.

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Presenters

  • Seiya Hayakawa

    • Center for Nuclear Study, the University of Tokyo

Authors

  • Seiya Hayakawa

    • Center for Nuclear Study, the University of Tokyo

  • Minju Kim

    • Department of Physics, Sungkyunkwan University

  • Andy Chae

    • Department of Physics, Sungkyunkwan University

  • Kodai Okawa

    • Center for Nuclear Study, the University of Tokyo

  • Satoshi Adachi

    • CYRIC, Tohoku University
    • CYRIC, Tohoku Universty
    • Cyclotron and Radioisotope Center, Tohoku University
    • Department of Physics, Osaka University
    • Cyclotron and Rareisotope Center, Tohoku University

  • Soomi Cha

    • Center for Exotic Nuclear Studies, Institute for Basic Science (IBS)

  • Thomas Chillery

    • Center for Nuclear Study, the University of Tokyo
    • CNS, University of Tokyo, Japan

  • Ngoc Ngyen Duy

    • Department of Physics, Sungkyunkwan University

  • Tatsuya Furuno

    • Department of Physics, Osaka University
    • Department of Physics, School of Science, Osaka University
    • Depertment of Physics, Osaka University

  • Gyungmo Gu

    • Department of Physics, Sungkyunkwan University

  • Shutaro Hanai

    • Center for Nuclear Study, the University of Tokyo
    • Center for Nuclear Study, The University of Tokyo

  • Nobuaki Imai

    • Center for Nuclear Study, the University of Tokyo
    • Center for Nuclear Study, The University of Tokyo
    • CNS, University of Tokyo
    • CNS, University of Tokyo, Japan
    • Center for Nuclear Study, University of Tokyo

  • David Kahl

    • Extreme Light Infrastructure Nuclear Physics (ELI-NP)

  • Takahiro Kawabata

    • Department of Physics, Osaka University
    • Department of Physics, School of Science, Osaka University
    • Osaka University
    • Depertment of Physics, Osaka University

  • Chanhee Kim

    • Department of Physics, Sungkyunkwan University

  • Dahee Kim

    • Center for Exotic Nuclear Studies, Institute for Basic Science (IBS)

  • Sohun Kim

    • Department of Physics, Sungkyunkwan University

  • Shigeru Kubono

    • RIKEN Nishina Center
    • Univ of Tokyo
    • RIKEN

  • Minsik Kwag

    • Department of Physics, Sungkyunkwan University
    • Center for Exotic Nuclear Studies, Institute for Basic Science (IBS)

  • Jiatai Li

    • Center for Nuclear Study, the University of Tokyo

  • Nanru Ma

    • Center for Nuclear Study, the University of Tokyo

  • Shin'ichiro Michimasa

    • CNS, The University of Tokyo
    • The University of Tokyo
    • Center for Nuclear Study, the University of Tokyo
    • Center for Nuclear Study, The University of Tokyo
    • CNS, University of Tokyo
    • CNS, University of Tokyo, Japan

  • Kosuke sakanashi

    • Department of Physics, School of Science, Osaka University
    • Department of Physics, Osaka University
    • Department of physics, Osaka University

  • Hideki Shimizu

    • Center for Nuclear Study, the University of Tokyo

  • Oana Sirbu

    • Extreme Light Infrastructure Nuclear Physics (ELI-NP)

  • Kim Uyen Ngyuen

    • Department of Physics, Sungkyunkwan University

  • Hidetoshi Yamaguchi

    • Center for Nuclear Study, the University of Tokyo
    • Center for Nuclear Study, University of Tokyo

  • Rin Yokoyama

    • CNS, The University of Tokyo
    • Center for Nuclear Study, the University of Tokyo

  • Qian Zhang

    • Center for Nuclear Study, the University of Tokyo
    • Center for Nuclear Study, University of Tokyo