Počet záznamů: 1
Characterization and Calibration of Novel Semiconductor Detectors of Thermal Neutrons for ESA Space Applications
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SYSNO ASEP 0385327 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV Záznam nebyl označen do RIV Název Characterization and Calibration of Novel Semiconductor Detectors of Thermal Neutrons for ESA Space Applications Tvůrce(i) Kohout, Z. (CZ)
Granja, C. (CZ)
Králík, M. (CZ)
Owens, A. (FR)
Venn, R. (GB)
Jankowski, L. (GB)
Pospíšil, S. (CZ)
Sopko, B. (CZ)
Vacík, Jiří (UJF-V) RID, ORCID, SAICelkový počet autorů 9 Zdroj.dok. 2011 IEEE Nuclear Science Symposium Conference Record. - : IEEE, 2011 - ISSN 1082-3654 - ISBN 978-1-4673-0118-3 Rozsah stran s. 400-404 Poč.str. 5 s. Akce 2011 IEEE Nuclear Science Symposium Conference Datum konání 23.10.2011-29.10.2011 Místo konání Valencia Země ES - Španělsko Typ akce WRD Jazyk dok. eng - angličtina Klíč. slova semiconductor detectors ; thermal neutrons ; space applications Vědní obor RIV BG - Jaderná, atomová a mol. fyzika, urychlovače Institucionální podpora UJF-V - RVO:61389005 DOI 10.1109/NSSMIC.2011.6154526 Anotace For the study and detection of neutrons in space environments such as planetary and earth orbiting missions semiconductor silicon diode detectors have been characterized and calibrated at various thermal neutron sources. Two types of diodes adapted for thermal neutron detection were investigated: silicon MESA planar detectors equipped with thin 6LiF layers and silicon heterodiodes with a layer of natural boron or enriched 10B. The response and absolute detection efficiency have been measured. The influence of bias voltage and converter layer thickness were studied. As neutron sources we used a homogenous isotropic thermal neutron field by a set of PuBe radionuclide sources placed in a graphite pile as well as a parallel thermal neutron beam with high Cd ratio (105) and suppressed gamma background. Depending on the converter layer thickness and/or boron layer thickness as well as the choice of the threshold level, efficiencies of approximately 1% are obtained for both the silicon diodes with thin 6LiF and the boron rich silicon detectors. These values guarantee optimal stability of operation in remote and different environments as well as maximum signal-to-noise ratio by enhanced suppression of unwanted signals and gamma background. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2013
Počet záznamů: 1