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Statements

Subject Item
n2:RIV%2F68407700%3A21220%2F11%3A00189684%21RIV12-MSM-21220___
rdf:type
n7:Vysledek skos:Concept
dcterms:description
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 (10^5) 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. 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 (10^5) 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.
dcterms:title
Characterization and Calibration of Novel Semiconductor Detectors of Thermal Neutrons for ESA Space Applications Characterization and Calibration of Novel Semiconductor Detectors of Thermal Neutrons for ESA Space Applications
skos:prefLabel
Characterization and Calibration of Novel Semiconductor Detectors of Thermal Neutrons for ESA Space Applications Characterization and Calibration of Novel Semiconductor Detectors of Thermal Neutrons for ESA Space Applications
skos:notation
RIV/68407700:21220/11:00189684!RIV12-MSM-21220___
n7:predkladatel
n8:orjk%3A21220
n4:aktivita
n9:V
n4:aktivity
V
n4:dodaniDat
n15:2012
n4:domaciTvurceVysledku
n6:5545706 n6:7735472
n4:druhVysledku
n22:D
n4:duvernostUdaju
n10:S
n4:entitaPredkladatele
n11:predkladatel
n4:idSjednocenehoVysledku
189948
n4:idVysledku
RIV/68407700:21220/11:00189684
n4:jazykVysledku
n21:eng
n4:klicovaSlova
thermal neutron detection
n4:klicoveSlovo
n20:thermal%20neutron%20detection
n4:kontrolniKodProRIV
[DB74A4202696]
n4:mistoKonaniAkce
Valencia
n4:mistoVydani
Piscataway, New Jersey
n4:nazevZdroje
IEEE Nuclear Science Symposium and Medical Imaging Conference 2011
n4:obor
n18:BF
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
9
n4:rokUplatneniVysledku
n15:2011
n4:tvurceVysledku
Pospíšil, Stanislav Králík, M. Sopko, Bruno Owens, A. Kohout, Zdeněk Jankowski, L. Venn, R. Vacík, J. Granja, Carlos Humberto
n4:typAkce
n12:WRD
n4:zahajeniAkce
2011-10-23+02:00
s:issn
1082-3654
s:numberOfPages
5
n16:doi
10.1109/NSSMIC.2011.6154526
n17:hasPublisher
Omnipress
n5:isbn
978-1-4673-0118-3
n19:organizacniJednotka
21220