Study of the change of single-particle states around the exotic nucleus with N=20

2012 Fiscal Year Final Research Report

• Project/Area Number: 23740215
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: IMAI Nobuaki 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (80373273)
• Research Collaborator: TERANISHI Takashi 九州大学, 理学研究院, 准教授 (10323495)
• Project Period (FY): 2011 – 2012
• Keywords: 短寿命核 / 反転の島 / 単一粒子軌道 / 陽子共鳴弾性散乱 / 分光学的因子

Research Abstract

Single particle structure of the neutron-rich nucleus <31>^Mg was studied by proton resonance elastic scattering on <30>^Mg to understand the mechanism of the exotic nuclear structure in the “island of inversion”. The experiment was successfully performed at ISOLDE facility at CERN. The spectroscopic factors deduced for the first two bound states were found to be strongly suppressed. The present experiment reveals the border of the “island of inversion”for the first time.

Research Products

• [Journal Article] Development of a resonant laser ionization gas cell for high-energy, short-lived nuclei (2013)
  • Author(s): T. Sonoda, M.Wada, H. Tomita, C. Sakamoto, T. Takatsuka, T. Noto, Y.Matsuo, H. Iimura, T. Shinozuka, T.Wakui, T. Kubo, P. Schury, Y. Ito, S.Naimi, S. Nakamura, H. Mita, T. Furukawa, H. Miyatake, S. Jeong, H.Ishiyama, N. Imai, Y.Watanabe, Y. Hirayama
  • Journal Title: Nuclear Instruments and Methods in Physics Research Volume: B 295 Pages: 1-10
  • Peer Reviewed
• [Journal Article] Wall-loss distribution of charge breeding ions in an electron cyclotron resonance ion source (2012)
  • Author(s): S.C. Jeong, M. Oyaizu, N. Imai, Y. Hirayama, H. Ishiyama, H. Miyatake, K. Niki, M. Okada, Y.X. Watanabe, Y. Otokawa, A. Osa, S. Ichikawa
  • Journal Title: Rev. Sci. Instrum Volume: 83 Pages: 02A910
  • Peer Reviewed
• [Journal Article] Structure of <28>^Mg studied by b-decay spectroscopy of spin-polarized 28Na: The first step of systematic studies on neutron-rich Mg isotopes (2012)
  • Author(s): K. Kura, K. Tajiri, T. Shimoda, A. Odahara, T. Hori, M. Kazato, T. Masue, M. Suga, A. Takashima, T. Suzuki, T. Fukuchi, Y. Hirayama, N. Imai, H. Miyatake, M. Pearson, C. D. P. Levy, and K. P. Jackson
  • Journal Title: Phys. Rev Volume: C5 Pages: 034310
  • Peer Reviewed
• [Journal Article] Isobaric analog resonances of the N=21 nucleus ^<35>Si (2012)
  • Author(s): N. Imai, Y. Hirayama, Y.X. Watanabe, T. Teranishi, T. Hashimoto, S.Hayakawa, Y. Ichikawa, H. Ishiyama, S.C. Jeong, D. Kahl, S. Kubono, H.Miyatake, H. Ueno, H. Yamaguchi, K.Yoneda, A. Yoshimi
  • Journal Title: Phys. Rev Volume: C85 Pages: 034313
  • Peer Reviewed
• [Journal Article] Low-background prebunching system for heavy-ion beams at the Tokai radioactive ion accelerator complex (2012)
  • Author(s): M. Okada, K. Niki, Y. Hirayama, N. Imai, H. Ishiyama, S. C. Jeong, I. Katayama, H. Miyatake*, M. Oyaizu, Y. X. Watanabe, S. Arai, H. Makii and Y. Wakabayashi
  • Journal Title: Phys. Rev. ST Accel. Beams Volume: 15 Pages: 030101
  • Peer Reviewed
• [Journal Article] Eur (2012)
  • Author(s): Y. Hirayama, M.Mihara, Y.X.Watanabe, S.C.Jeong, N.Imai, K.Matsuta, H.Miyatake, T.Hashimoto, H.Ishiyama, S.Ichikawa, T.Ishii, T.Izumikawa, I.Katayama, H.Kawakami, H. Kawamura, I.Nishinaka, K.Nishio, H.Makii, S.Mitsuoka, S.Momota, A.Osa, Y.Otokawa, T.K.Sato
  • Journal Title: Phys. J Volume: 48 Pages: 54
  • Peer Reviewed
• [Presentation] Proton resonance elastic scattering on <30>^Mg (2012)
  • Author(s): Nobuaki Imai et al
  • Organizer: ISOLDE workshop and Users meeting 2012
  • Place of Presentation: Geneva, Switzerland
  • Year and Date: 20121217-19
• [Presentation] Nuclear Structure around <32>^Mg via proton resonance elastic scattering (2012)
  • Author(s): N. Imai (招待講演)
  • Organizer: The 8^thChina-Japan Joint Nuclear Physics Symposium
  • Place of Presentation: Beijing, China
  • Year and Date: 20121015-19
• [Presentation] A single shot experiment: Proton 図 3. 弾性散乱断面積のエネルギー関数。実線は、共鳴が三つと仮定した時の R 行列曲線。点線は二つを仮定した時のもの。 resonance elastic scattering for single particle structure of a neutron-rich nucleus (2012)
  • Author(s): N. Imai (招待講演)
  • Organizer: RIBF Users Meeting 2012
  • Place of Presentation: Wako, Japan
  • Year and Date: 20120620-21
• [Remarks] ホームページ共鳴散乱の項参照
  • URL: http://kekrnb.kek.jp/