About: A new reflector structure for facility thermalizing D-T neutrons

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A facility for thermalization of fast neutrons (14.2 MeV) emitted by compact deuterium-tritium (D-T) neutron generators (NGs) for thermal neutron activation analysis is proposed. Its final design is based on Monte Carlo calculations (MCNP5). To maximize the ratio between the thermal neutron flux and the total neutron flux and simultaneously to ensure the highest possible value of the thermal neutron flux at the output surface, the facility should consist of a two-layer reflector [tungsten (W)-the inner part, molybdenum-the outer part], a two-layer multiplier (W followed by lead), a moderator (polyethylene followed by magnesium fluoride) and a collimator (molybdenum and nickel near the output surface). For the D-T NG producing the maximum available neutron yield 10(15) n s(-1), the facility provides the thermal neutron flux 2.0 x 10(11) n cm(-2) s (-1) and a slightly higher fast neutron flux 2.3 x 10(11) n cm(-2) s(-1). To improve the ratio of the thermal neutron flux to the fast neutron flux (above 2.7) an addition of a silicon layer to the moderator and especially a proper adjustment and a threefold increase of the multiplier thickness is necessary. A facility for thermalization of fast neutrons (14.2 MeV) emitted by compact deuterium-tritium (D-T) neutron generators (NGs) for thermal neutron activation analysis is proposed. Its final design is based on Monte Carlo calculations (MCNP5). To maximize the ratio between the thermal neutron flux and the total neutron flux and simultaneously to ensure the highest possible value of the thermal neutron flux at the output surface, the facility should consist of a two-layer reflector [tungsten (W)-the inner part, molybdenum-the outer part], a two-layer multiplier (W followed by lead), a moderator (polyethylene followed by magnesium fluoride) and a collimator (molybdenum and nickel near the output surface). For the D-T NG producing the maximum available neutron yield 10(15) n s(-1), the facility provides the thermal neutron flux 2.0 x 10(11) n cm(-2) s (-1) and a slightly higher fast neutron flux 2.3 x 10(11) n cm(-2) s(-1). To improve the ratio of the thermal neutron flux to the fast neutron flux (above 2.7) an addition of a silicon layer to the moderator and especially a proper adjustment and a threefold increase of the multiplier thickness is necessary. (en)
Title	A new reflector structure for facility thermalizing D-T neutrons A new reflector structure for facility thermalizing D-T neutrons (en)
skos:prefLabel	A new reflector structure for facility thermalizing D-T neutrons A new reflector structure for facility thermalizing D-T neutrons (en)
skos:notation	RIV/61989100:27640/14:86091454!RIV15-MSM-27640___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(ED1.1.00/02.0070), P(ED2.1.00/03.0082)
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Pištora, Jaromír
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola báňská - Technická univerzita Ostrava / Centrum nanotechnologií
http://linked.open...dnocenehoVysledku	920
http://linked.open...ai/riv/idVysledku	RIV/61989100:27640/14:86091454
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Thermalization; Reflector; MCNP; Fast neutrons; Collimation (en)
http://linked.open.../riv/klicoveSlovo	Fast neutrons MCNP Collimation Reflector Thermalization
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[5FE815145211]
http://linked.open...i/riv/nazevZdroje	Journal of radioanalytical and nuclear chemistry
http://linked.open...in/vavai/riv/obor	BG
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	IT4Innovations Centre of Excellence Institute of clean technologies for mining and utilization of raw materials for energy use
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	300
http://linked.open...iv/tvurceVysledku	Pištora, Jaromír Kadulová, Miroslava Uhlář, Radim Alexa, Petr
http://linked.open...ain/vavai/riv/wos	000334505700045
issn	0236-5731
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s10967-014-3050-0
http://localhost/t...ganizacniJednotka	27640

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