About: Diffusion of 6Li in Ta and W

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Předmětem studia práce byla difúze 6Li v Ta a W. Vzorky byly připraveny iontovou implantací izotopu 6Li (380 keV) do tenkých fóliích Ta a W (s fluencí až 1E16 cm-2) a žíháním až do teplot 1940 C. Hloubkové profily 6Li byly určovány pomocí metody neutronového hloubkového profilování. Výsledky ukázaly, že difúze 6Li v Ta a W je velmi komplikovaná a nemůže být popsána jednoduchými Fickovými zákony. Pro vysvětlení difúzního chování izotopu 6Li v povrchových vrstvách Ta a W bylo nutné předpokládat existenci tzv. záchytových center. Tím však nebylo možné objasnit komplikované difúzní chování 6Li v Ta a W úplně. K tomu je bude nutné vzít do úvahy i další aspekty jako např. hloubkově závislé difúzní koeficienty aj. (cs) The objective of this work was the study of 6Li diffusion in the Ta and W refractory metals. The samples were prepared by ion implantation of 380 keV 6Li ions into W and Ta thin foils (up to the fluence of 1E16 ions/cm2) and annealed up to the temperature 1940 C. The depth profiles of 6Li were determined using the Thermal Neutron Depth Profiling (TNDP) technique. The results showed that diffusion of 6Li in both W and Ta foils is very complex and cannot be described by simple Fick’s laws. Trapping centers (in the subsurface layers of both W and Ta metals) were supposed in a trial to explain the 6Li diffusion behavior. However, the 6Li depth profiles were only partly explained. Other aspects are necessary to take into account for more proper quantification; such as spatially dependent diffusion coefficients, etc. The objective of this work was the study of 6Li diffusion in the Ta and W refractory metals. The samples were prepared by ion implantation of 380 keV 6Li ions into W and Ta thin foils (up to the fluence of 1E16 ions/cm2) and annealed up to the temperature 1940 C. The depth profiles of 6Li were determined using the Thermal Neutron Depth Profiling (TNDP) technique. The results showed that diffusion of 6Li in both W and Ta foils is very complex and cannot be described by simple Fick’s laws. Trapping centers (in the subsurface layers of both W and Ta metals) were supposed in a trial to explain the 6Li diffusion behavior. However, the 6Li depth profiles were only partly explained. Other aspects are necessary to take into account for more proper quantification; such as spatially dependent diffusion coefficients, etc. (en)
Title	Diffusion of 6Li in Ta and W Diffusion of 6Li in Ta and W (en) Difúze 6Li v Ta a W (cs)
skos:prefLabel	Diffusion of 6Li in Ta and W Diffusion of 6Li in Ta and W (en) Difúze 6Li v Ta a W (cs)
skos:notation	RIV/61389005:_____/06:00040559!RIV07-AV0-61389005
http://linked.open.../vavai/riv/strany	865;868
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(1H-PK2/05), P(GA202/05/0410), Z(AV0Z10480505), Z(MSM2672244501)
http://linked.open...iv/cisloPeriodika	1-2
http://linked.open...vai/riv/dodaniDat	2007
http://linked.open...aciTvurceVysledku	Červená, Jarmila Vacík, Jiří Havránek, Vítězslav Hnatowicz, Vladimír
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	Ústav jaderné fyziky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	471675
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/06:00040559
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	diffusion; thermal neutron depth profiling; isotope separation on-line (en)
http://linked.open.../riv/klicoveSlovo	diffusion isotope separation on-line thermal neutron depth profiling
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[47AB162A7731]
http://linked.open...i/riv/nazevZdroje	Nuclear Instruments and Methods in Physical Research. B
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Use of advanced neutron and photon detectors in the applied research for the evaluation of monitoring, safety and reliability of nuclear utilities. Diffusion of He, Li, Be and B in ISOL targets studied with the neutron depth profiling technique
http://linked.open...UplatneniVysledku	2006
http://linked.open...v/svazekPeriodika	249
http://linked.open...iv/tvurceVysledku	Hnatowicz, Vladimír Havránek, Vladimír Vacík, Jiří Koster, U. Pasold, G. Červená, Jarmila
http://linked.open...n/vavai/riv/zamer	Jaderná fyzika a příbuzné obory v základním, aplikovaném a interdisciplinárním výzkumu Basic Research and Oriented Research in Industry and Medicine using Neutron Sources
issn	0168-583X
number of pages	4 (xsd:int)
is http://linked.open...avai/riv/vysledek of	Diffusion of 6Li in Ta and W Diffusion of 6Li in Ta and W

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