Study for double beta decay of 48Ca

2011 Fiscal Year Final Research Report

• Project/Area Number: 21244034
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Osaka University
• Principal Investigator: KISHIMOTO Tadafumi 大阪大学, 大学院・理学研究科, 教授 (90134808)
• Co-Investigator(Kenkyū-buntansha): OGAWA Izumi 福井大学, 大学院・工学系研究科, 准教授 (20294142) ; NOMACHI Masaharu 大阪大学, 核物理研究センター, 教授 (90208299)
• Project Period (FY): 2009 – 2011
• Keywords: 原子核実験 / 二重ベータ崩壊 / ニュートリノ

Research Abstract

Measurement of neutrino-less double beta decay provides a test for the Majorana nature of neutrinos and gives an absolute scale of the effective neutrino mass. In order to search for neutrino-less double beta decay of^<48> Ca, we constructed CANDLES system by using CaF2 scintillators. We checked the performances of the CANDLES system and started a measurement of neutrino-less double beta decay. The sensitivity of the CANDLES III system is 0. 5eV for neutrino mass.

Research Products

• [Journal Article] Neutrino-less double beta decay of 48Ca-CANDLES- (2011)
  • Author(s): T. Kishimoto, et al.
  • Journal Title: AIP Conf. Proc. Volume: 1388巻 Pages: 142-148
  • Peer Reviewed
• [Journal Article] Study of 48Ca double beta decay by CANDLES CANDLES、Collaboration (2011)
  • Author(s): I. Ogawa, T. Kishimoto, et al,
  • Journal Title: Phys. Conf. Ser. Volume: 312巻 Pages: 072014
  • Peer Reviewed
• [Journal Article] Light output response of KamLAND liquid scintillator for protons and C-12 nuclei (2011)
  • Author(s): S. Yoshida, T. Kishimoto, I. Ogawa, et al.
  • Journal Title: Nucl. Instrum. Meth. Volume: 622巻 Pages: 574-582
  • Peer Reviewed
• [Journal Article] Study of double beta decay of 48Ca by CANDLES (2011)
  • Author(s): S. Umehara, T. Kishimoto, et al.
  • Journal Title: AIP Conf. Proc. Volume: 1235巻 Pages: 287-293
  • Peer Reviewed
• [Journal Article] Study of 48Ca double beta decay with CANDLES (2011)
  • Author(s): I. Ogawa, T. Kishimoto, et al.
  • Journal Title: J. Phys. Conf. Ser. Volume: 203巻 Pages: 012073
  • Peer Reviewed
• [Journal Article] Mass dependence of calcium isotope fractionations in crown-ether resin chromatography (2011)
  • Author(s): Y. Fujii, S. Umehara, T. Kishimoto, et al.
  • Journal Title: Isotopes in Environmental and Health Studies Volume: 46巻 Pages: 233-241
  • Peer Reviewed
• [Journal Article] Kaon-Nucleus Interaction Studied through the in-flight(K-, N) Reactio ns (2009)
  • Author(s): Kishimoto, T., et al.
  • Journal Title: Nuclear Physics A Volume: 827巻 Pages: 321c-323c
  • Peer Reviewed
• [Journal Article] Ultra-violet wavelength shift forundoped CaF2 scintillation detectorby two phase of liquid scintillator system in CANDLES、NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS (2009)
  • Author(s): Yoshida, S., Kishimoto, T., et al.
  • Journal Title: Ultra-violet wavelength shift forundoped CaF2 scintillation detectorby two phase of liquid scintillatorsystem in CANDLES、NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTIONA-ACCELERATORS Volume: 601巻 Pages: 282-293
  • Peer Reviewed
• [Journal Article] Study of the decay K+=> pi+, nu, nubar in the momentum region 140<Ppi<199 MeV/ c (2009)
  • Author(s): A. V. Artamonov, et al.
  • Journal Title: Physical Review D Volume: 79巻 Pages: 092004
  • Peer Reviewed
• [Journal Article] Candles for the Study of Neutrino less Double-Beta Decay(20'+ 5') (2009)
  • Author(s): Ogawa, I., et al.
  • Journal Title: Journal of Physics : Conference Series Volume: 203巻 Pages: 012073
  • Peer Reviewed
• [Presentation] Double Beta Decay and Matter Dominated Universe、International Conference on Physics (2012)
  • Author(s): T. Kishimoto
  • Organizer: Mandalay 2012(招待講演)
  • Place of Presentation: Mandalay University, Mandalay, Myanmar
  • Year and Date: 2012-02-04
• [Presentation] Position Reconstruction for CANDLES III(U. G.) (2011)
  • Author(s): Kensuke Yasuda
  • Organizer: International Workshop on" Double Beta Decay and Neutrinos"
  • Place of Presentation: クリスタルタワー、大阪
  • Year and Date: 2011-11-16
• [Presentation] SingleαEvents Analysis by Pulse Shape Discrimination with CANDLES III(U. G.) (2011)
  • Author(s): Go Ito
  • Organizer: International Workshop on" Double Beta Decay and Neutrinos"
  • Place of Presentation: クリスタルタワー、大阪
  • Year and Date: 2011-11-16
• [Presentation] Improvement of the Energy Resolution by Cooling CaF2(pure) and WLS for CANDLES (2011)
  • Author(s): Kazuya Takubo
  • Organizer: International Workshop on" Double Beta Decay and Neutrinos"
  • Place of Presentation: クリスタルタワー、大阪
  • Year and Date: 2011-11-16
• [Presentation] The Lifetime measurement of single beta decay of 48Ca (2011)
  • Author(s): Wang Wei
  • Organizer: International Workshop on" Double Beta Decay and Neutrinos"
  • Place of Presentation: クリスタルタワー、大阪
  • Year and Date: 2011-11-16
• [Presentation] Energy Calibrationfor CANDLES III (2011)
  • Author(s): Hidekazu Kakubat a、Energy Calibration for CANDLES III
  • Organizer: International Workshop on" Double Beta Decay andNeutrinos"
  • Place of Presentation: クリスタルタワー、大阪
  • Year and Date: 2011-11-16
• [Presentation] CANDLES for the study of Double Beta Decay of 48Ca (2011)
  • Author(s): Saori Umehara
  • Organizer: International Workshop on" Double Beta Decay and Neutrinos"
  • Place of Presentation: クリスタルタワー、大阪
  • Year and Date: 2011-11-16
• [Presentation] Nuclear Science in Japan (2011)
  • Author(s): T. Kishimoto
  • Organizer: International symposium on frontiersin nuclear physics(招待講演)
  • Place of Presentation: Beihang University, Beijing, China
  • Year and Date: 2011-11-01
• [Presentation] Data Acquisition System of CANDLES Detector for Double Beta Decay Experiment (2011)
  • Author(s): Saori Umehara
  • Organizer: 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference
  • Place of Presentation: Valencia, Spain
  • Year and Date: 2011-10-27
• [Presentation] Search for Neutrino-less Double Beta Decay with CANDLES (2011)
  • Author(s): Saori Umehara
  • Organizer: The 19th Particles and Nuclei International Conference(PANIC11)
  • Place of Presentation: Cambridge, MIT, USA
  • Year and Date: 2011-07-28
• [Presentation] The next generation projects in Deep Underground (2011)
  • Author(s): T. Kishimoto
  • Organizer: Laboratories、ASPERA Workshop 2011(招待講演)
  • Place of Presentation: Zaragoza & Canfranc, Spain
  • Year and Date: 2011-07-01
• [Presentation] CANDLES for the study of double beta decay of 48Ca and its enrichment (2010)
  • Author(s): T. Kishimoto
  • Organizer: The International Symposium on Nuclear Physics in Asia、(招待講演)
  • Place of Presentation: Beihang Univ.,北京中国
  • Year and Date: 20101013-15
• [Presentation] Low radioactivity CaF2 scintillator crystals for CANDLES (2010)
  • Author(s): I. Ogawa
  • Organizer: Topical Workshop in Low Radioactivity Techniques, LRT2010
  • Place of Presentation: Sudbury, Canada
  • Year and Date: 20100828-29
• [Presentation] CANDLES for the study of 48Ca double beta decay (2010)
  • Author(s): T. Kishimoto
  • Organizer: Fundamental Physics Using Atoms 2010(招待講演)
  • Place of Presentation: 大阪大学、大阪
  • Year and Date: 20100807-09
• [Presentation] Study of 48Ca Double Beta Decay by CANDLES (2010)
  • Author(s): I. Ogawa
  • Organizer: International Nuclear Physics Conference, INPC2010
  • Place of Presentation: Vancouver, Canada
  • Year and Date: 20100704-09
• [Presentation] Nutrino-less doublebeta decay of 48Ca studied by CaF2 Scintillator (2009)
  • Author(s): Saori Umehara
  • Organizer: CTP International Conference On Nuclear Physics in LHC Era
  • Place of Presentation: Luxor, Egypt
  • Year and Date: 2009-11-19
• [Presentation] Study of Double Beta Decay of 48Ca with CANDLES (2009)
  • Author(s): Saori Umehara
  • Organizer: The 7th Japan-China Joint Nuclear Physics Symposium
  • Place of Presentation: Univ. of Tsukuba Ibaraki
  • Year and Date: 2009-11-12
• [Presentation] Background reductionby position reconstruction for CANDLES III (2009)
  • Author(s): Kensuke Yasuda
  • Organizer: Third Joint meeting of thenuclear physics division of the APS and JPS
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2009-10-17
• [Presentation] Study of background origin bydata analysis and simulation for CANDLES III (2009)
  • Author(s): Go Ito
  • Organizer: Third Joint meeting of thenuclear physics division of the APS and JPS
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2009-10-17
• [Presentation] Opening Address (2009)
  • Author(s): T. Kishimoto
  • Organizer: Double Beta Decay and Neutrinos 2009(DBD09)組織委員長
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2009-10-11
• [Presentation] Kaon-nucleus interaction studied by kaon induced reactions (2009)
  • Author(s): T. Kishimoto
  • Organizer: International Symposium on Exotic Nuclei(EXON-2009)
  • Place of Presentation: Sochi, Russia
  • Year and Date: 2009-09-30
• [Presentation] Candles for the Study of Neutrino less Double-Beta Decay(20'+ 5') (2009)
  • Author(s): I. Ogawa
  • Organizer: TAUP2009
  • Place of Presentation: Rome, Italy
  • Year and Date: 2009-07-03
• [Remarks]
  • URL: http://wwwkm.phys.sci.osaka-u.ac.jp/