Study of deformed structure in mass 40 region using CAGRA gamma-ray spectrometer

ORAL

Abstract

In mass 40 region of atomic nuclei, onset of various structures, such as superdeformation, shape co-existence, cluster structure, etc., is expected. In order to clarify such structure, we are pursuing a systematic study of high-spin states by in-beam gamma-ray spectroscopy. In the previous studies, superdeformed rotational band was observed at 36,40Ar, 40Ca, and 44Ti. Among them, it is not yet well understood at 44Ti and high-spin states are known up to 12+ level. To understand the deformed structure of 44Ti and also neighboring isotopes, we performed gamma-ray spectroscopy using 24Mg+24Mg reaction.

  Experiment was performed at cyclotron facility in RCNP, Osaka University. A 104MeV 24Mg beam was irradiated on the 24Mg target of 0.5mg/cm2 thickness. Gamma rays and charged particles were measured by CAGRA gamma-ray spectrometer and Si-Ball charged particle filter, respectively. CAGRA is an array of 16 Clover type Ge detectors with BGO Compton suppression shield, constructed by international collaboration between Japan, the US and China.

  Recent analysis results on high-spin states of mass 40 region will be presented.

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Presenters

  • Eiji Ideguchi

    RCNP, Osaka Univ., RCNP, Osaka University, Research Center for Nuclear Physics, Osaka University

Authors

  • Eiji Ideguchi

    RCNP, Osaka Univ., RCNP, Osaka University, Research Center for Nuclear Physics, Osaka University

  • Yong-De Fang

    IMP, China

  • Michael P P Carpenter

    Argonne Natl Lab, Argonne National Laboratory, ANL

  • Rin Yokoyama

    Univ of Tennessee, Knoxville, Univ. of Tennessee, Knoxville

  • Shin'ichiro Michimasa

    Center for Nuclear Study, the University of Tokyo, Center for Nuclear Study, University of Tokyo, CNS, Univ. of Tokyo, CNS, University of Tokyo

  • Takeshi Koike

    Tohoku University, Tohoku Univ.

  • Hooi Jin Ong

    RCNP, Osaka University, RCNP, Osaka Univ., RCNP, Osaka Uni., Japan

  • Yassid Ayyad

    LBNL

  • Shumpei Noji

    Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA, National Superconducting Cyclotron Laboratory, Michigan State University, E, Michigan State Univ., FRIB/NSCL, Michigan State University, for the FRIB HRS Working Group

  • Nori Aoi

    RCNP, Osaka Univ., RCNP, Osaka University, Research Center for Nuclear Physics, Osaka University, RCNP Osaka University, RCNP, Osaka Uni., Japan

  • Dinh Trong Tran

    RCNP, Osaka Univ., RCNP, Osaka University, RCNP, Osaka Uni., Japan

  • Azusa Inoue

    RCNP, Osaka Univ., RCNP (Osaka University), RCNP, Osaka University, Research Center for Nuclear Physics, Osaka University

  • Chihiro Iwamoto

    CNS, University of Tokyo, Center for Nuclear Science, University of Tokyo, Center for Nuclear Study, the University of Tokyo

  • Thi Ha Hoang

    RCNP, Osaka Univ., RCNP, Osaka University, Research Center for Nuclear Physics, Osaka University

  • Phaikying Chan

    RCNP, Osaka University

  • Tomokazu Suzuki

    RCNP, Osaka University, RCNP, Osaka Univ.

  • Atsushi Tamii

    RCNP, Osaka Univ., RCNP (Osaka University), RCNP, Osaka University, RCNP, Research Center for Nuclear Physics, Osaka University

  • Yasutaka Yamamoto

    RCNP, Osaka Univ., RCNP, Osaka University, Research Center for Nuclear Physics, Osaka University

  • Rikuto Yanagihara

    ANL, IMP, TIFR, LBNL, KTH, INFN-LNL Legnaro, Osaka Univ., RCNP, Osaka University

  • Atsuko Odahara

    Department of Physics, Osaka University, Dept. of Phys., Osaka Univ., Osaka Univ., Osaka University

  • Shinnosuke Kanaya

    Department of Physics, Osaka University, Dept. of Phys., Osaka Univ., Osaka Univ.

  • Hiroki Nishibata

    RIKEN Nishina Center, RIKEN

  • Hiroshi Kanaoka

    Osaka Univ.

  • Shaofei Zhu

    Argonne National Laboratory, Argonne Natl Lab

  • Eiji Ideguchi

    RCNP, Osaka Univ., RCNP, Osaka University, Research Center for Nuclear Physics, Osaka University