Efficient preparation of Rydberg atoms toward neutrino pair emission

• Project/Area Number: 20740138
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Okayama University
• Principal Investigator: FUKUMI Atsushi Okayama University, 理学部, 助教 (40426656)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 素粒子(実験) / ニュートリノ / 原子分光 / レーザー / 超放射 / ニュートリノ質量 / 原子物理 / ニュートリノ質量分光 / マトリックス単離法

Research Abstract

We started a project of neutrino mass spectroscopy by means of the neutrino pair emission from metastable atoms. It is necessary to prepare the initial metastable state rapidly and efficiently. Atomic barium in a heat pipe oven was used as a target. Making use of super-radiance, which is known as a cooperative radiative effect, the population transfer to the matastable state was achieved with the efficiency of 7% and the duration of a few ns.

Research Products

• [Journal Article] Parity Violating Observables in Radiative Neutrino Pair Emission from Metastable Atoms (2010)
  • Author(s): Motohiko Yoshimura, Atsushi Fukumi, Noboru Sasao, Takuya Yamaguchi
  • Journal Title: Prog. Theor. Phys. Vol.123 Pages: 523-532
  • NAID: 110007573229
  • Peer Reviewed
• [Journal Article] parity Violating Observables in Radiative Neutrino Pair Emission from Metastable Atoms (2010)
  • Author(s): Motohiko Yoshimura, Atsushi Fukumi, Nboru Sasao, Takuya Yamaguchi
  • Journal Title: Progress of theoretical physics 1 Pages: 523532-523532
  • NAID: 110007573229
  • Peer Reviewed
• [Journal Article] Towards CP-even Neutrino Beam (2009)
  • Author(s): A. Fukumi, H. Nanjo, I. Nakano, N. Sasao, S. Sato, M. Yoshimura
  • Journal Title: J. Phsy. Soc. Jpn. Vol.78 Pages: 132011-3
  • NAID: 110007042089
  • Peer Reviewed
• [Journal Article] Macro-coherent two photon and radiative neutrino pair emission (2008)
  • Author(s): M. Yoshimura, C. Ohae, A. Fukumi, K. Nakajima, I. Nakano, H. Nanjo, N. Sasao
  • Journal Title: arXive 0805 Pages: 1970-1970
• [Presentation] マクロコヒーランス増幅機構を用いたニュートリノ質量分光(III)-コヒーラント標的の基礎研究- (2008)
  • Author(s): 福見敦, 内音坊僚平, 大饗千彰, 川口建太郎, 久保園芳博, 幸田康成, 笹尾登, 佐藤晴一, 唐健, 中嶋享, 中野逸夫, 南條創, 百瀬孝昌, 吉村太彦
  • Organizer: 日本物理学会2008年秋季大会
  • Place of Presentation: 山形大学
  • Year and Date: 2008-09-23
• [Remarks]
  • URL: http://fphy.hep.okayama-u.ac.jp/center-qu/majolennon/index.html
• [Remarks]
  • URL: http://fphy.hep/okayama-u.ac.jp/center-qu/maiolennon/index.html