Investigation of a new technique by a Cherenkov detector to search for neutrinoless double beta decays

2016 Fiscal Year Final Research Report

• Project/Area Number: 26610068
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nagoya University
• Principal Investigator: Matsuoka Kodai 名古屋大学, 現象解析研究センター, 特任准教授 (70623403)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ニュートリノレス二重ベータ崩壊 / チェレンコフ検出器 / ベータ線

Outline of Final Research Achievements

To search for neutrino-less double beta decays, I proposed a new technique to reconstruct the beta-ray kinetic energy by means of velocity measurement with a Cherenkov detector. The first idea was that the velocity was deduced from the Cherenkov ring image. In a Monte Carlo simulation, the energy resolution and efficiency for a 1.5 MeV beta-ray were estimated to be about 10% (FWHM) and 20%, respectively. To improve the performance, I invented another new technique that measured the time-of-flight of the beta-ray to deduce the velocity. The expected energy resolution and efficiency for a 1.26 MeV beta-ray were improved to be about 13% (FWHM) and 44%, respectively.

Free Research Field

素粒子実験