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DETERMINATION OF THE ACTIVITY OF LONG-LIVED 41Ca IN REACTOR BIOLOGICAL SHIELDING MATERIALS BY PHOTOACTIVATION METHOD
- Authors: Zheltonozhskaya M.V.1, Balaba Y.O.1, Iyusyuk D.A.1, Kuzmenkova N.V.1, Chernyaev A.P.1
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Affiliations:
- Lomonosov Moscow State University, Faculty of Physics
- Issue: Vol 87, No 3 (2024)
- Pages: 274-281
- Section: МАТЕРИАЛЫ 73-Й МЕЖДУНАРОДНОЙ КОНФЕРЕНЦИИ ПО ЯДЕРНОЙ ФИЗИКЕ. Ядра. Эксперимент
- URL: https://journals.rcsi.science/0044-0027/article/view/273287
- DOI: https://doi.org/10.31857/S0044002724030167
- EDN: https://elibrary.ru/IVUZJI
- ID: 273287
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Abstract
The paper discusses a photoactivation method for determining the activity of the long-lived isotope 41Ca relative to the activity of 60Co in irradiated reactor biological shielding concrete. It is proposed to use photonuclear reactions on cobalt and calcium isotopes: 59Co(γ, 𝑛)58Co, 44Ca(γ, 𝑝)43K or 48Ca( γ, n)47Ca→47Sc. to determine the activity of 41Ca. The sensitivity of the proposed method is of the order of ∼10-6 Bq/g, provided that semiconductor spectrometers with an ultrapure germanium detector are used. The structure and chemical composition of the sample do not affect the proposed method. It avoids the long sample preparation times associated with radiochemical methods.
About the authors
M. V. Zheltonozhskaya
Lomonosov Moscow State University, Faculty of Physics
Email: zhelton@yandex.ru
Moscow, Russia
Y. O. Balaba
Lomonosov Moscow State University, Faculty of PhysicsMoscow, Russia
D. A. Iyusyuk
Lomonosov Moscow State University, Faculty of PhysicsMoscow, Russia
N. V. Kuzmenkova
Lomonosov Moscow State University, Faculty of PhysicsMoscow, Russia
A. P. Chernyaev
Lomonosov Moscow State University, Faculty of PhysicsMoscow, Russia
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