A Change in the Parameters of Si(Li) Detectors under Exposure to α Particles

N. V. Bazlov, S. V. Bakhlanov, A. V. Derbin, I. S. Drachnev, G. A. Izegov, I. M. Kotina, V. N. Muratova, N. V. Niyazova, D. A. Semenov, M. V. Trushin, E. V. Unzhakov, E. A. Chmel

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

Abstract—: A spectrometer based on a Si(Li) detector has been tested by exposure to α particles with the aim of determining changes in the detector characteristics versus the fluence. As a result of 60-day measurements with a total fluence of 6.2 × 109 α particles, it has been established that the dependence of the deterioration in the energy resolution of α-particle peaks on the fluence is described by a linear function with a slope of Δσ/ΔФ = (8.4 ± 0.4) × 10–10 keV/α. The measured amplitude of the α-particle momentum decreases linearly with increasing fluence with a slope of (–4.8 ± 0.6) × 10–9 keV/α. These effects do not prevent reliable discrimination between the signals from α particles and fission fragments until the fluence reaches a value of 1010 α particles when the Si(Li) detector is a part of a neutron source for detecting fission fragments.

Язык оригиналаанглийский
Страницы (с-по)25-29
Число страниц5
ЖурналInstruments and Experimental Techniques
Том63
Номер выпуска1
DOI
СостояниеОпубликовано - 1 янв 2020

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