Underground physics and the barometric pumping effect observed for thermal neutron flux underground
- Авторы: Stenkin Y.V.1,2, Alekseenko V.V.1, Gromushkin D.M.2, Sulakov V.P.3, Shchegolev O.B.1
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Учреждения:
- Institute for Nuclear Research
- National Research Nuclear University МЕРhI (Moscow Engineering Physics Institute)
- Skobeltsyn Institute of Nuclear Physics
- Выпуск: Том 124, № 5 (2017)
- Страницы: 718-721
- Раздел: Nuclei, Particles, Fields, Gravitation, and Astrophysics
- URL: https://journals.rcsi.science/1063-7761/article/view/192154
- DOI: https://doi.org/10.1134/S106377611704015X
- ID: 192154
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Аннотация
It is known that neutron background is a major problem for low-background experiments carrying out underground, such as dark matter search, double-beta decay searches and other experiments known as Underground Physics. We present here some results obtained with the en-detector of 0.75 m2, which is running for more than 4 years underground at a depth of 25 m water equivalent in Skobeltsyn Institute of Nuclear Physics, Moscow State University. Some spontaneous increases in thermal neutron flux up to a factor of 3 were observed in delayed anti-correlation with barometric pressure. The phenomenon can be explained by the radon barometric pumping effect resulting in similar effect in neutron flux being produced in (α, n)-reactions by alpha-decays of radon and its daughters in surrounding rock. This is the first demonstration of the barometric pumping effect observed in thermal neutron flux underground.
Об авторах
Yu. Stenkin
Institute for Nuclear Research; National Research Nuclear University МЕРhI (Moscow Engineering Physics Institute)
Автор, ответственный за переписку.
Email: stenkin@sci.lebedev.ru
Россия, Moscow, 117312; Moscow, 115409
V. Alekseenko
Institute for Nuclear Research
Email: stenkin@sci.lebedev.ru
Россия, Moscow, 117312
D. Gromushkin
National Research Nuclear University МЕРhI (Moscow Engineering Physics Institute)
Email: stenkin@sci.lebedev.ru
Россия, Moscow, 115409
V. Sulakov
Skobeltsyn Institute of Nuclear Physics
Email: stenkin@sci.lebedev.ru
Россия, Moscow, 119991
O. Shchegolev
Institute for Nuclear Research
Email: stenkin@sci.lebedev.ru
Россия, Moscow, 117312
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