Laser spectroscopy of unstable tungsten isotopes by using an on-line gas cell

• Project/Area Number: 24540311
• 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: Japan Atomic Energy Agency
• Principal Investigator: IIMURA HIDEKI 独立行政法人日本原子力研究開発機構, 原子力科学研究部門・原子力基礎工学研究センター, 研究主幹 (10343906)
• Co-Investigator(Renkei-kenkyūsha): KOIZUMI Mitsuo 独立行政法人日本原子力研究開発機構, 核不拡散・核セキュリティ総合支援センター, 研究主幹 (30354814) ; MIYABE Masabumi 独立行政法人日本原子力研究開発機構, 原子力科学研究部門・原子力基礎工学研究センター, 研究主幹 (20354863) ; OBA Masaki 独立行政法人日本原子力研究開発機構, 原子力科学研究部門・原子力基礎工学研究センター, 研究副主幹 (60414588) ; WADA Michiharu 独立行政法人理化学研究所, 仁科加速器研究センター, チームリーダー (50240560) ; SONODA Tetsu 独立行政法人理化学研究所, 仁科加速器研究センター, 仁科センター研究員 (60525583) ; HIRAYAMA Yoshikazu 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, 研究機関講師 (30391733)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2012: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: レーザー分光 / ガスセル / タングステン / 不安定核 / 核半径

Outline of Final Research Achievements

Precise measurement of the atomic spectrum of radioactive tungusten isotopes has been awaited to clarify the change of charge radii between these nuclei. In order to do laser spectroscopy for these nuclei, we have developed a gas cell connected on-line to an accelerator. A violet diode-laser system was used to improve sensitivity. With this setup, we plan to measure the isotope shifts in atomic spectra of radioactive tungusten isotopes.

Research Products

• [Journal Article] Charge radii in macroscopic-microscopic mass models (2015)
  • Author(s): Iimura, H., Moller, P., Ichikawa, T., Sagawa, H., Iwamoto, A.
  • Journal Title: JPS Conference Proceedings Volume: 6
  • Peer Reviewed / Open Access
• [Journal Article] Transport of laser beams for PALIS (2014)
  • Author(s): H. Iimura, T. Sonoda, M. Wada
  • Journal Title: RIKEN Accelerator Progress Report 2013 Volume: 47
  • Peer Reviewed
• [Journal Article] Development of a resonance 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 et al.
  • Journal Title: Nucl. Instr. Meth. B Volume: 295 Pages: 1-10
  • Peer Reviewed
• [Journal Article] Laser ablation absorption spectroscopy for remote analysis of uranium (2013)
  • Author(s): M. Miyabe, M. Oba, H. Iimura, K. Akaoka, Y. Maruyama, H. Ohba, M. Tampo, I. Wakaida
  • Journal Title: Hyperfine Interact. Volume: 216 Issue: 1-3 Pages: 71-77
  • DOI: 10.1007/s10751-013-0845-2
  • Peer Reviewed
• [Journal Article] Doppler-shifted optical absorption characterization of plume-lateral expansion in laser ablation of a cerium target (2012)
  • Author(s): M. Miyabe, M. Oba, H. Iimura, K. Akaoka, Y. Maruyama, H. Ohba, M. Tampo, I. Wakaida
  • Journal Title: J. Appl. Phys. Volume: 112 Issue: 12 Pages: 1233031-10
  • DOI: 10.1063/1.4771879
  • Peer Reviewed
• [Presentation] Laser spectroscopy of the neutron deficient La isotopes (2014)
  • Author(s): Iimura, H., Buchinger, F., Crawford, J. E., Gulick, S., Cocolios, T. E., Kolomenski, A., Fahes, M., Schuessler, H. A.
  • Organizer: 2nd Conf. on Advances in Radioactive Isotope Science
  • Place of Presentation: 東京大学（東京都）
  • Year and Date: 2014-06-03
• [Presentation] Proposals of collinear laser spectroscopy at SLOWRI
  • Author(s): H. Iimura
  • Organizer: 第７回低速・停止同位体研究会
  • Place of Presentation: 理化学研究所（和光市）
• [Presentation] Laser spectroscopy of the neutron deficient La isotopes
  • Author(s): H. Iimura, F. Buchinger, J.E. Crawford, S. Gulick, T.E. Cocolios, A. Kolomenski, M. Fahes, H.A. Schuessler
  • Organizer: Advances in Radioactive Isotope Science
  • Place of Presentation: 東京大学（東京都）
• [Presentation] Charge radii in macroscopic-microscopic mass models
  • Author(s): H. Iimura, P. Moller, T. Ichikawa, H. Sagawa, A. Iwamoto
  • Organizer: Advances in Radioactive Isotope Science
  • Place of Presentation: 東京大学（東京都）
• [Presentation] 高融点元素の核荷電半径測定のためのレーザーアブレーション共鳴分光法の開発
  • Author(s): 飯村 秀紀、大場 正規、小泉光生、宮部 昌文、若井田 育夫
  • Organizer: 日本物理学会
  • Place of Presentation: 京都産業大学（京都市）
• [Presentation] Proposal of laser spectroscopy at SLOWRI
  • Author(s): H. Iimura
  • Organizer: Workshop on Low-Energy Radioactive Isotope Beam Production by In-Gas Ionization
  • Place of Presentation: 理化学研究所（和光市）
• [Presentation] Nuclear charge radii by laser spectroscopy
  • Author(s): H. Iimura
  • Organizer: Workshop on Systematic Study of Nuclear Radii: Theory and Experiment
  • Place of Presentation: 理化学研究所（和光市）
  • Invited
• [Remarks] JAEA核データ研究グループホームページ＞レーザー核分光
  • URL: http://wwwndc.jaea.go.jp/Labo/Laser_JP.html
• [Remarks] JAEA核データ研究グループホームページ＞レーザー核分光
  • URL: http://wwwndc.jaea.go.jp/nscience/laser/theme04.html
• [Remarks] http://nscience.jaea.go.jp