Measurement of magnetic moment of neutron-rich unstable nuclei

• Project/Area Number: 23540336
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tohoku University
• Principal Investigator: SHINOZUKA TSUTOMU 東北大学, サイクロトロン・ラジオアイソトープセンター, 非常勤講師 (10134066)
• Co-Investigator(Kenkyū-buntansha): WAKUI Takashi 東北大学, サイクロトロン・ラジオアイソトープセンター, 助教 (70359644)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: 原子核構造 / 不安定核 / オンライン質量分離 / イオンガイド法 / SPIG / RFIGISOL / 核モーメント / 質量分離 / SPIG法 / 磁気モーメント / 不安定単寿命核

Research Abstract

To conduct the precision nuclear spectroscopy of neutron-rich nuclei in the medium mass region, we have been developing an RF-ion guide method with a short extraction time and a high extraction efficiency. In this study, we have newly installed a sextupole ion guide (SPIG) which is used to transport the ions from the exit hole of the gas cell to the acceleration electrode. The SPIG improves the efficiency of differential pumping and reduces the energy spread of the extracted ions. This results in a high mass resolution and consequently in a large mass-separated yield of neutron-rich nuclei at the detection region. The mass resolving power (MRP), defined as M/delta M, has been measured for the stable Xe isotopes to investigate the effect of the SPIG. The MRP of 310 was achieved after installing the SPIG. The MRP is more than 5 times higher than that before installing the SPIG. We have succeeded in improving the MRP with the SPIG.

Research Products

• [Journal Article] An effective method for trapping ion beams in superfluid helium for laser spectroscopy experiments (2014)
  • Author(s): X. F. Yang, T. Furukawa, T. Wakui, K. Imamura, H. Fujita, Y. Mitsuya, M. Hayasaka, Y. Ichikawa, Y. Ishibashi, H. Shirai, Y. Ebara, A. Hatakeyama, M. Wada, T. Sonoda, T. Ito, T. Kobayashi, S. Nishimura, M. Nishimura, Y. Kondo, K. Yoneda, H. Ueno , T.Shinozuka, T. Shimoda , K. Asahi, Y. Matsuo
  • Journal Title: European Physical Journal: Web of Conferences Volume: 66 Pages: 11041-11041
  • DOI: 10.1051/epjconf/20146611041
  • Peer Reviewed
• [Journal Article] Ｎｏｂｅｌ ｎｕｃｌｅａｒ ｌａｓｅｒ ｓｐｅｃｔｒｏｓｃｏｐｙ ｍｅｔｈｏｄ ｕｓｉｎｇ ｓｕｐｅｒｆｌｕｉｄ ｈｅｌｉｕｍ ｆｏｒ ｍｅａｓｕｒｅｍｅｎｔ ｏｆ ｓｐｉｎｓ ａｎｄ ｍｏｍｅｎｔｓ ｏｆ ｅｘｏｔｉｃ ｎｕｃｌｅｉ (2013)
  • Author(s): Ｔ． Ｆｕｒｕｋａｗａ
  • Journal Title: Ｎｕｃｌ． Ｉｎｓｔｒｕｍ． ａｎｄ Ｍｅｔｈｏｄｓ Ｂ Volume: ３１７ Pages: 590-594
  • DOI: 10.1016/j.nimb.2013.08.023
  • Peer Reviewed
• [Journal Article] Control of stopping position of radioactive ion beam in superfluid helium for laser spectroscopy experiments (2013)
  • Author(s): X. F. Yang, T. Furukawa, T. Wakui, K. Imamura, H. Tetsuka, T. Fujita, Y. Yamaguchi, Y. Tsutsui, Y. Mitsuya, Y. Ichikawa, Y. Ishibashi, N. Yoshida, H. Shirai, Y. Ebata, M. Hayasaka, S. Arai, S. Muramoto, A. Hatakeyama, M. Wada, T. Sonoda, Y. Ito, T. Kobayashi, S. Nishimura, M. Nishimura, Y. Kondo, et al.
  • Journal Title: Nuclear Instruments and Methods in Physics Researches Section B Volume: 317 Pages: 599-602
  • DOI: 10.1016/j.nimb.2013.07.068
  • Peer Reviewed
• [Journal Article] Development of a resonance laser ionization gas cell for high-energy, short-lived nuclei (2013)
  • Author(s): T. Sonoda, M. Wada, H. Tomita, C. Sakamoto, T. Takatsuka, T. Furukawa, H. Iimura, Y. Ito, T. Kubo, Y. Matsuo, H. Mita, S. Naimi, S. Nakamura, T. Noto, P. Schury, T. Shinozuka, T. Wakui, H. Miyatake, S. Jeong, H. Ishiyama, Y. X. Watanabe, Y. Hirayama, K. Okada, A. Takamine
  • Journal Title: Nucl. Instr. Meth. Phys. Res. B Volume: 295 Pages: 1-10
  • DOI: 10.1016/j.nimb.2012.10.009
  • Peer Reviewed
• [Journal Article] Development of a gas cell-based laser ion source for RIKENPALIS (2013)
  • Author(s): T. Sonoda, M. Wada, H. Tomita, C. Sakamoto, T. Takatsuka, T. Noto, H. Iimura, Y. Matsuo, T. Kubo, T. Shinozuka, T. Wakui, H. Mita, S. Naimi, T. Furukawa, Y. Itou, P. Schury, H. Miyatake, S. Jeong, H. Ishiyama, Y. Watanabe, Y. Hirayama
  • Journal Title: Hyperfine Interactions Volume: 216 Issue: 1-3 Pages: 103-107
  • DOI: 10.1007/s10751-013-0817-6
  • Peer Reviewed
• [Journal Article] Shallow and diffuse spin-orbit potential for proton elastic scattering from neutron-rich helium isotopes at 71~MeV/nucleon (2013)
  • Author(s): S. Sakaguchi, T. Nakamura et al.
  • Journal Title: Phys.Rev.C Volume: 021601 Issue: 2 Pages: 87-87
  • DOI: 10.1103/physrevc.87.021601
  • Peer Reviewed
• [Presentation] RIBF-SLOWRI 共鳴イオン化レーザーイオン源(PALIS)の開発とレーザー核分光への応用 (2013)
  • Author(s): 園田哲
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 高知大学
• [Presentation] 偏極陽子標的を用いた陽子ノックアウト反応による14, 22, 24O のスピン軌道分離の研究II (2013)
  • Author(s): 川瀬頌一郎
  • Organizer: 第68回日本物理学会年次大会
  • Place of Presentation: 広島大学
• [Presentation] ペンタセン分子の光励起三重項状態の時間発展とその温度依存性 (2013)
  • Author(s): 河原朋美
  • Organizer: 第68回日本物理学会年次大会
  • Place of Presentation: 広島大学
• [Presentation] RIBF-SLOWRI共鳴イオン化レーザーイオン源(PALIS)の開発とレーザー核分光への応用 (2013)
  • Author(s): 園田哲
  • Organizer: 日本物理学会 2013年 秋季大会
  • Place of Presentation: 高知大学朝倉キャンパス
• [Presentation] 偏極陽子標的を用いた陽子ノックアウト反応による14,22,24Oのスピン軌道分離の研究II (2013)
  • Author(s): 川瀬頌一郎
  • Organizer: 第68回日本物理学会年次大会
  • Place of Presentation: 広島大学東広島キャンパス
• [Presentation] ペンタセン分子の光励起三重項状態の時間発展とその温度依存性 (2013)
  • Author(s): 河原朋美
  • Organizer: 第68回日本物理学会年次大会
  • Place of Presentation: 広島大学東広島キャンパス
• [Presentation] Recent activities with RF-IGISOL at CYRIC (2012)
  • Author(s): K. Shimada
  • Organizer: EMIS2012(XVI International conference on electromagnetic isotope separators and techniques related to their applications)
  • Place of Presentation: 松江
• [Presentation] Development of a gas cell-based laser ion source for RIKEN PALIS (2012)
  • Author(s): T. Sonoda
  • Organizer: EMIS2012(XVI International conference on electromagnetic isotope separators and techniques related to their applications)
  • Place of Presentation: 松江
• [Presentation] evelopment of a gas cell-based laser ion source for RIKEN PALIS (2012)
  • Author(s): T. Sonoda
  • Organizer: EMIS2012 (XVI International conference on electromagnetic isotope separators and techniques related to their applications)
  • Place of Presentation: Matsue, Japan
• [Presentation] Recent activities with RF-IGISOL at CYRIC (2012)
  • Author(s): K. Shimada
  • Organizer: EMIS2012 (XVI International conference on electromagnetic isotope separators and techniques related to their applications)
  • Place of Presentation: Matsue, Japan
• [Presentation] 偏極陽子標的を用いた陽子ノックアウト反応による14,22,24Oのスピン軌道分離の研究 (2012)
  • Author(s): 川瀬頌一郎
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 京都産業大学
• [Remarks]
  • URL: http://choukai.cyric.tohoku.ac.jp/shino_lab/index.php