Электронный каталог

Статья

An, F.P.
First Measurement of the Yield of *8He Isotopes Produced in Liquid Scintillator by Cosmic-Ray Muons at Daya Bay / F.P.An, D.Dolzhikov, M.Gonchar, D.Naumov, E.Naumova, A.Olshevskiy, K.Treskov, V.Zavadskyi, [a.o.] // Physical Review D [Electronic resource]. – 2024. – Vol. 110, No. 1. – P. L011101. – URL: https://doi.org/10.1103/PhysRevD.110.L011101. – Bibliogr.: 28.

Daya Bay presents the first measurement of cosmogenic *8He isotope production in liquid scintillator, using an innovative method for identifying cascade decays of *8He and its child isotope, *8Li. We also measure the production yield of *9Li isotopes using well-established methodology. The results, in units of 10&sup(−8)⁢𝜇&sup(−1)⁢g&sup(−1)  cm*2, are 0.307 ± 0.042, 0.341 ± 0.040, and 0.546 ± 0.076 for *8He, and 6.73 ± 0.73, 6.75 ± 0.70, and 13.74 ± 0.82 for *9Li at average muon energies of 63.9 GeV, 64.7 GeV, and 143.0 GeV, respectively. The measured production rate of *8He isotopes is more than an order of magnitude lower than any other measurement of cosmogenic isotope production. It replaces the results of previous attempts to determine the ratio of *8He to *9Li production that yielded a wide range of limits from 0% to 30%. The results provide future liquid-scintillator-based experiments with improved ability to predict cosmogenic backgrounds.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 344.1х - Методы регистрации нейтрино
Спец.(статьи,препринты) = С 344.1ж - Сцинтилляционные счетчики, камеры. Сцинтилляционные вещества. Микроканальные умножители
Спец.(статьи,препринты) = С 347 г - Взаимодействие космических лучей с нуклонами и ядрами
Бюллетени = 33/024