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

• 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
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2011: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• 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 / 短寿命核構造 / R行列計算 / 殻構造の変容

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
  • 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: 34310-34310
  • 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: 34313-34313
  • 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: 30101-30101
  • 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: 54-54
  • Peer Reviewed
• [Journal Article] Tilted-foil technique for producing a spin-polarized radioactive isotope beam (2012)
  • Author(s): Y. Hirayama, M. Mihara, Y. X. Watanabe, S. C. Jeong, H. Miyatake, S. Momota, T. Hashimoto, N. Imai, K. Matsuta, H. Ishiyama, S. Ichikawa, T. Ishii, T. Izumikawa, I. Katayama, H. Kawakami, H. Kawamura, I. Nishinaka, K. Nishio, H. Makii, S. Mitsuoka, A. Osa
  • Journal Title: European Physical Journal A Volume: 48 Issue: 5 Pages: 54-54
  • DOI: 10.1140/epja/i2012-12054-1
  • Peer Reviewed
• [Journal Article] Romain Leguillon and Costel Petrache, Structure of Mg Isotope Studied byβ-Decay Spectroscopy of Spin-Polarized Na Isotopes - Shape Coexistence in 30Mg - (2012)
  • Author(s): Tadashi Shimoda, Kunihiko Tajiri, Atsuko Odahara, Masaki Suga, Noriaki Hamatani, Hiroki Nishibata, Jun Takatsu, Rin Yokoyama, Yoshikazu Hirayama, Nobuaki Imai, Hiroari Miyatake, Mathew Pearson, C. D. P. Levy, K. P. Jackson
  • Journal Title: Progress of Theoretical Physics Supplement Volume: Vol. 196 Pages: 310-315
  • DOI: 10.1143/ptps.196.310
  • NAID: 110009543689
  • Peer Reviewed
• [Journal Article] Isobaric analog resonances of the N=21 nucleus 35Si (2012)
  • Author(s): N.Imai, et al
  • Journal Title: Phys.Rev.C Volume: 85 Issue: 3 Pages: 34313-34313
  • DOI: 10.1103/physrevc.85.034313
  • Peer Reviewed
• [Journal Article] Structure of ^<28>Mg studied by β-decay of spin-polarized ^<28>Na : The first step of systematic studies on neutron-rich Mg isotopes (2012)
  • Author(s): K.Kura, K.Tajiri, et al
  • Journal Title: Physical Review C Volume: Vol.85,No.3 Issue: 3 Pages: 34310-34310
  • DOI: 10.1103/physrevc.85.034310
  • Peer Reviewed
• [Journal Article] Spin-polarization of radioactive 123Ing.s.by the tilted-foil method (2011)
  • Author(s): Y.Hirayama, et al
  • Journal Title: Eur.Phys.J.A Volume: 47 Issue: 11 Pages: 138-138
  • DOI: 10.1140/epja/i2011-11138-8
  • 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
• [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
• [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
• [Presentation] A single shot experiment: Proton resonance elastic scattering for single particle structure of a neutron-rich nucleus (2012)
  • Author(s): Nobuaki Imai
  • Organizer: RIBF Users Meeting 2012
  • Place of Presentation: 和光市、理化学研究所
  • Invited
• [Presentation] Nuclear Structure around 32Mg via proton resonance elastic scattering (2012)
  • Author(s): Nobuaki Imai
  • Organizer: The 8th China-Japan Joint Nuclear Physics Symposium
  • Place of Presentation: Beijin, China
  • Invited
• [Presentation] Proton resonance elastic scattering on 30Mg (2012)
  • Author(s): Nobuaki Imai
  • Organizer: ISOLDE workshop and Users meeting 2012
  • Place of Presentation: Geneve, Switzerland
• [Remarks] ホームページ共鳴散乱の項参照
  • URL: http://kekrnb.kek.jp/
• [Remarks] 陽子共鳴弾性散乱
  • URL: http://kekrnb.kek.jp/
• [Remarks]
  • URL: http://kekrnb.kek.jp/
• [Remarks] 共鳴弾性散乱の項参照。