Enrichment of Double Beta Decay Isotope by Crown-ether & Microchip Chemical Plant

2010 Fiscal Year Final Research Report

• Project/Area Number: 19540300
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Hiroshima University
• Principal Investigator: HAZAMA Ryuta Hiroshima University, 大学院・工学研究院, 講師 (00379299)
• Co-Investigator(Renkei-kenkyūsha): KISHIMOTO Tadafumi 大阪大学, 大学院・理学研究科, 教授 (90134808) ; SAKUMA Yoichi 東京工業大学, 原子炉工学研究所, 特任教授 (30133119) ; TANIMIZU Masaharu 独立行政法人海洋研究開発機構, 高知コア研究所, 研究員 (20373459) ; TOKESHI Manabu 名古屋大学, 工学研究科, 准教授 (60311437)
• Project Period (FY): 2007 – 2010
• Keywords: 実験核物理 / 素粒子実験 / 化学工学 / 同位体分離 / マイクロ・ナノデバイス

Research Abstract

The double beta decay, which can study the absolute neutrino mass and its Majorana nature, is one of the most important research and we will start CANDLES experiment soon utilizing 300kg of CaF_2 crystals containing of ^<48>Ca with the highest Q-value among double beta decay nuclei. The calcium cannot be enriched by centrifugal and diffusion separations and electromagnetic separation costs much and its production is limited only for tens of grams. We developed chemical isotope separation by liquid-liquid extraction with crown-ether and obtained the highest separation factor of 1.012(2℃)～1.014(20℃) (about two times of Jepson's 1.008 and five times of resin's 1.003) and showed the validity of microchip for the extraction process by gas-liquid two phase isotope exchange reaction and micromixer for emulsification droplets.

Research Products

• [Journal Article] Development of μTAS System for Remove of Tritium and Isotope Separati on (2010)
  • Author(s): R.Hazama, Y.Sakuma, Y.Ogata, M.Tokeshi
  • Journal Title: Annual Report of National Institute for Fusion Science Vol. Pages: 473
• [Journal Article] マイクロリアクタ技術による化学濃縮に関する可能性評価の研究 (2010)
  • Author(s): 硲隆太、坂本憲児、三宅亮
  • Journal Title: 平成21年度 文科省広島大学先端研究施設共用イノベーション創出事業成果報告書 Pages: 31-32
• [Journal Article] トリチウム除去及び同位体分離に向けたμTASシステムの構築 (2010)
  • Author(s): 硲隆太
  • Journal Title: 核融合研究所一般共同研究成果報告書 Pages: 402
• [Journal Article] Study of ^<48>Ca double beta decay with CANDLES (2010)
  • Author(s): I.Ogawa, T.Kishimoto, S.Umehara, R.Hazama, et al.
  • Journal Title: Journal of Physics : Conference Series 203 Pages: "012073-1"-"012073-3"
  • Peer Reviewed
• [Journal Article] Remove of Tritium from Tritiated Water and Isotope Separation by Microchips (2009)
  • Author(s): R.Hazama, Y.Sakuma, Y.Ogata, M.Tokeshi
  • Journal Title: Annual Report of National Institute for Fusion Science Vol. Pages: 456
• [Journal Article] マイクロチップによるトリチウム水からのトリチウム除去及び同位体分離 (2009)
  • Author(s): 硲隆太
  • Journal Title: 核融合研究所一般共同研究成果報告書 Pages: 365
• [Journal Article] Remove of Tritium from Tritiated Water and Isotope Separation by Microchips (2008)
  • Author(s): R.Hazama, Y.Sakuma, Y.Ogata, M.Tokeshi
  • Journal Title: Annual Report of National Institute for Fusion Science Vol. Pages: 475
• [Journal Article] Study of double beta decay of ^<48>Ca with CANDLES (2008)
  • Author(s): Y.Hirano, T.Kishimoto, I.Ogawa, R.Hazama, et al.
  • Journal Title: Journal of Physics : Conference Series 120 Pages: 052053-052055
  • Peer Reviewed
• [Journal Article] "Challenge on ^<48>Ca enrichment for CANDLES double beta decay experiment", Proc.of 6^<th> Rencontres du Vietnam(Challenges in Particle Astrophysics) (2007)
  • Author(s): R.Hazama Y.Tatewaki, T.Kishimoto, et al.
  • Journal Title: The Gioi Publishers(ed.J.Dumarchez, et al.) Vol.6(arXiv:0710.3840) Pages: 383-386
• [Presentation] マイクロリアクターによるCa濃縮 (2010)
  • Author(s): 硲隆太
  • Organizer: 二重ベータ崩壊研究懇談会(招待講演)
  • Place of Presentation: 宮城県モンタナリゾート岩沼
  • Year and Date: 2010-12-18
• [Presentation] マイクロチップによる同位体分離 (2010)
  • Author(s): 硲隆太、三宅亮、秋田誠広、佐久間洋一、緒方良至、渡慶次学
  • Organizer: 日本原子力学会、2010年秋の大会 講演要旨集
  • Place of Presentation: 北海道大学
  • Year and Date: 2010-09-17
• [Presentation] ^<48>Ca enrichment liquid-liquid extraction (2009)
  • Author(s): 硲隆太
  • Organizer: 3^<rd> joint meeting of the Nuclear Physics Divisions of APS and JPS (Hawaii 2009)
  • Place of Presentation: Hilton Waikoloa Village, Hawaii island, USA.
  • Year and Date: 2009-10-12
• [Presentation] Enrichment of ^<48>Ca ?-Separation with a crown ether- (2009)
  • Author(s): 硲隆太
  • Organizer: UCB-OU Collaboration meeting on double beta decay
  • Place of Presentation: Lawrence Berkeley National Laboratory, USA.
  • Year and Date: 2009-02-05
• [Presentation] Enrichment of ^<48>Ca (2007)
  • Author(s): 硲隆太
  • Organizer: International Workshop on Double Beta Decay and Neutrinos (DBD07)
  • Place of Presentation: Crystal Tower, Osaka Business Park, JAPAN.
  • Year and Date: 2007-06-12
• [Presentation] Double Beta Decay Experiment CANDLES using ^<48>Ca and chemical isotope separation (2007)
  • Author(s): 硲隆太
  • Organizer: The 7^<th> Eichrom Users'Seminar For The Extraction Chromatography : Resin and Columns
  • Place of Presentation: Tokyo Garden Palace, Tokyo, JAPAN.
  • Year and Date: 2007-05-29
• [Remarks] ホームページ等
  • URL: http://www.nifs.ac.jp/report/annrep.html
• [Remarks]
  • URL: http://iopscience.iop.org/1742-6596/203/1/012073
• [Remarks]
  • URL: http://iopscience.iop.org/1742-6596/120/5/052053
• [Remarks]
  • URL: http://arxiv.org/abs/0710.3840
• [Remarks]
  • URL: http://dbd09.phys.sci.osaka-u.ac.jp/
• [Remarks]
  • URL: http://dbd07.phys.sci.osaka-u.ac.jp/