Study of a self-radiolysis reaction of concentrated tritiated water by using spectroscopictechnique

• Project/Area Number: 24561022
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: University of Toyama
• Principal Investigator: KOBAYASHI Kaori 富山大学, 大学院理工学研究部(理学), 准教授 (80397166)
• Co-Investigator(Kenkyū-buntansha): HARA Masanori 富山大学, 水素同位体科学研究センター, 准教授 (00334714) ; OZEKI Hiroyuki 東邦大学, 理学部, 教授 (70260031)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 核融合 / トリチウム / 近赤外分光 / トリチウム水 / 分子分光 / 物理化学 / 放射線 / 分子分光学

Outline of Final Research Achievements

Tritium, when it is released to air, is said to be converted to tritiated water. We prepared a 1 m stainless double-walled cell and prepared a highly concentrated tritiated water that is necessary for the spectroscopic measurement. The near-infrared laser spectroscopy technique was applied to obtain the spectral information and assigned spectral lines based on the quantum chemical calculations. Two diode lasers were used to cover the two wavelength region about 1.38 micron and 1.45 micron. Including the information of the change in pressure, self-radiolysis reaction of the tritiated water due to the tritium's radioactivity was investigated.

Research Products

• [Journal Article] Analysis of a tritium enhanced water spectrum between 7200 – 7245 cm－1 using new variational calculations (2013)
  • Author(s): M. J. Down, J. Tennyson, M. Hara, Y. Hatano, and K. Kobayashi
  • Journal Title: Journal of Molecular Spectroscopy Volume: 289 Pages: 35-40
  • DOI: 10.1016/j.jms.2013.05.016
  • Peer Reviewed
• [Presentation] 1.45 ミクロン帯のトリチウム水の分光研究 (2014)
  • Author(s): 齋藤萌美
  • Organizer: 2014年度日本物理学会北陸支部定例学術講演会
  • Place of Presentation: 福井大学
  • Year and Date: 2014-12-13
• [Presentation] ANALYSIS OF 2ν3 BAND OF HTO (2014)
  • Author(s): 小林かおり
  • Organizer: International Symposium on Molecular Spectroscopy, 69th meeting
  • Place of Presentation: University of Illinois, Urbana-Champaign
  • Year and Date: 2014-06-16
• [Presentation] トリチウム水の近赤外分光データの解析
  • Author(s): 槇 泰喜、山本 拓也、小林 かおり、原 正憲、波多野 雄治
  • Organizer: 第7回分子科学討論会
  • Place of Presentation: 京都
• [Presentation] トリチウム水の高分解能分光のための二重管セルの作製
  • Author(s): 小林かおり、槇 泰喜、山本 拓也、原正憲、波多野雄治、尾関博之
  • Organizer: 日本原子力学会2014年春の年会
  • Place of Presentation: 東京