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Alpha spectrometry with the inexpensive open-source detector Alphaino
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH).
2019 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 928, p. 13-19Article in journal (Refereed) Published
Abstract [en]

A photodiode-based inexpensive detector working as counter and spectrometer for alpha particles, named Alphaino, is described and analyzed in depth. Prior to detector construction, Monte Carlo simulations by means of MCNPX ver. 2.7.0 code have been carried out to select the most suitable sensitive element for the intended applications. The detector has been tested for low-rate alpha-particle counting and spectroscopy, demonstrating a maximum achievable count rate of 4ā‹…103 sāˆ’1, with an energy resolution corresponding to a Full Width Half Maximum of 160keV over the entire energy range of measured alpha, namely 4āˆ’6.5 MeV, the intrinsic efficiency being 100%. Alphaino can be used for fast and qualitative analyses to radionuclides identification, and quantitative analyses when radionuclides monitored are characterized by well distinguished energy lines in spectra. Its applications will include 222Rn progeny monitoring by mechanical air sampling on a millipore filter, and disposable applications to qualitative measuring of potentially alpha-contaminated liquids (containing plutonium isotopes) by a droplet put on the photodiode itself, for a quick and cheap evaluation prior to initiate proper chemical treatments to classical alpha spectrometry by electrodeposition. Alphaino is completely open-source. The repository for the project is available on GITHUB at https://github.com/bemxgm/Radon-Monitor.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 928, p. 13-19
Keywords [en]
Alpha spectrometry, Photodiode, MCNPX, Open-source
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-251523DOI: 10.1016/j.nima.2019.03.018ISI: 000464345400003Scopus ID: 2-s2.0-85062856811OAI: oai:DiVA.org:kth-251523DiVA, id: diva2:1315865
Note

QC 20190515

Available from: 2019-05-15 Created: 2019-05-15 Last updated: 2019-05-29Bibliographically approved

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Colarieti-Tosti, Massimiliano
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