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2014 Fiscal Year Final Research Report

Detection of neutrino pairs using macro coherent amplification mechanism

Planned Research

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Project AreaExtreme quantum world opened up by atoms -towards establishing comprehensive picture of the universe based on particle physics-
Project/Area Number 21104002
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionOkayama University

Principal Investigator

SASAO NOBORU  岡山大学, その他部局等, 特任教授 (10115850)

Co-Investigator(Kenkyū-buntansha) NAKANO Itsuo  岡山大学, 大学院自然科学研究科, 教授 (90133024)
YOSHIMURA Motohiko  岡山大学, 理学部, 特任教授 (70108447)
FUKUMI Atsushi  川崎医療短期大学, 放射線技術科, 講師 (40426656)
WAKABAYASHI Tomonari  近畿大学, 理工学部, 教授 (30273428)
TANAKA Minoru  大阪大学, 大学院理学研究科, 助教 (70273729)
KATSURAGAWA Masayuki  電気通信大学, 大学院情報理工学研究科, 教授 (10251711)
Co-Investigator(Renkei-kenkyūsha) NANJO Hajime  京都大学, 大学院理学研究科, 助教 (40419445)
KAWAGUCHI Kentarou  岡山大学, 大学院自然科学研究科, 教授 (40158861)
TANG Jian  岡山大学, 大学院自然科学研究科, 准教授 (40379706)
KUBOZONO Yoshihiro  岡山大学, 大学院自然科学研究科, 教授 (80221935)
TANIGAKI Katsumi  東北大学, 大学院理学研究科, 教授 (60305612)
NAKAJIMA Kyo  岡山大学, 極限量子研究コア, 助教 (80400240)
YOSHIMURA Koji  岡山大学, 極限量子研究コア, 教授 (50272464)
YOSHIMI Akihiro  岡山大学, 極限量子研究コア, 准教授 (40333314)
UETAKE Satoshi  岡山大学, 大学院自然科学研究科, 准教授 (80514778)
KUMA Susumu  岡山大学, 極限量子研究コア, 助教 (50600045)
TANIGUCHI Takashi  岡山大学, 極限量子研究コア, 准教授 (60163630)
Project Period (FY) 2009-04-01 – 2015-03-31
Keywordsニュートリノ質量 / マヨラナ粒子 / マクロコヒーランス / 超放射
Outline of Final Research Achievements

"Macro-coherent amplification mechanism" is the crucial principle for success of the neutrino mass spectroscopy with atoms. The most important result of the present research was an experimental proof of the principle with a two photon process from the vibrationally excited state of para-hydrogen molecules. Actually, the initial coherent states were prepared by an adiabatic Raman process, and two photon emissions were observed. As a result, a gigantic enhancement factor of the photon yields greater than 15 orders of magnitude was confirmed compared to its natural emission rate; it was found consistent with the theoretical prediction. Thus a big step has been made forward towards the neutrino mass spectroscopy with atoms. In addition, detailed studies on super-radiance and phase relaxation etc. were conducted as basic studies using various atoms and molecules.

Free Research Field

高エネルギー物理学

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Published: 2016-06-03  

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