2022 Fiscal Year Final Research Report
Research and development of xenon bubble chamber for neutrinoless double beta decay search
| Project/Area Number |
19H01918
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
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| Research Institution | Obihiro University of Agriculture and Veterinary Medicine (2021-2022)
Tohoku University (2019-2020) |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
丸藤 亜寿紗 東北大学, ニュートリノ科学研究センター, 特任助教(研究) (20704399)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | ニュートリノ / キセノン / 泡箱 |
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| Outline of Final Research Achievements |
In order to verify the Majorana nature of neutrinos, we aim to develop a next-generation neutrinoless double beta decay search experiment of several tons class, and develop a xenon bubble chamber detector that can detect events by light emission using liquid xenon and identify particles by track confirmation. We introduced infrared illumination and cameras sensitive to infrared rays, developed containers and peripheral devices to hold liquid xenon, confirmed pressure fluctuations at minus 40 to 80 degrees Celsius and 2 to 7 atmospheres, and developed other peripheral devices and equipment. In addition, we tested whether it is possible to generate bubbles against radiation.
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| Free Research Field |
数物系科学
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| Academic Significance and Societal Importance of the Research Achievements |
ニュートリノを伴わない二重ベータ崩壊が観測されれば，ニュートリノは粒子と反粒子が同一であるマヨラナ粒子であるということが実証され，根本的な粒子の性質が一つ明らかになるとともに，我々の宇宙の天体などの構成物質が”反物質”ではなくほぼ”物質”のみで構築されているという謎を解明する鍵になると考えられる。これは我々がどのようにできているのかという根源的理由の説明につながるという意味で社会的意義がある。
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