Use of a Si(Li) detector as β spectrometer

The aim of this work is to demonstrate the capability of a Si(Li) detector for the measurement of β spectra, despite the energy absorption in air and in the Be window. A simple source holder fixes the source on the symmetry axis at 3mm from the detector window. The β-sources are produced by evaporat...

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Published in:Applied radiation and isotopes 2014-05, Vol.87, p.325-327
Main Authors: Dryak, P, Kovar, P
Format: Article
Language:English
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Endpoint of the β spectrum
Si(Li) detector
β-particle spectrometry
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description The aim of this work is to demonstrate the capability of a Si(Li) detector for the measurement of β spectra, despite the energy absorption in air and in the Be window. A simple source holder fixes the source on the symmetry axis at 3mm from the detector window. The β-sources are produced by evaporation on a plastic backing plate. Absorbing materials between the source and the sensitive volume of the detector are 3mm of air, a Be window, 0.1μm Si and 20nm of gold. A model of the detector was created for β spectra simulation using the MCNP 4A code. Experimental spectra of 14C, 147Pm, 204Tl, 90Sr/90Y were compared with simulated spectra. •Beta spectrometry by a Si(Li) detector.•Model by the MCNP method based on X-ray radiograph.•Comparison of the experimental and computed spectra.•Experimental determination of the endpoint for C-14, Pm-147, Tl-204, and Sr/Y-90.
doi_str_mv 10.1016/j.apradiso.2013.11.021
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subjects Endpoint of the β spectrum
Si(Li) detector
β-particle spectrometry
title Use of a Si(Li) detector as β spectrometer
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