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<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.

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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