About: Diffusion of Li-6 in tantalum and tungsten studied by the neutron depth profiling technique

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Difúze izotopu 6Li v Ta a W byla studována pomocí nedestruktivní metody neutronového hloubkového profilování. Předběžné výsledky poukazují na složitou difúzi atomů 6Li ve wolframu a tantalu. Experiment potvrdil, že difúze podle Fickova zákona je ovlivněna přítomností pastí a radiačními defekty v povrchové vrstvě vzorku. Další experimenty a počítačové simulace difúzního procesu pokračují. (cs) The objective of this work was the study of Li-6 diffusion in the Ta and W refractory metals. The samples were prepared by ion implantation of 380 keV Li-6(+) ions into W and Ta thin foils (up to the fluence of 10(16) ions/cm(2)) and annealed up to the temperature 1940 degrees C. The depth profiles of Li-6 were determined using the Thermal Neutron Depth Profiling (TNDP) technique. The results showed that diffusion of Li-6 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 Li-6 diffusion behaviour. However, the Li-6 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 Li-6 diffusion in the Ta and W refractory metals. The samples were prepared by ion implantation of 380 keV Li-6(+) ions into W and Ta thin foils (up to the fluence of 10(16) ions/cm(2)) and annealed up to the temperature 1940 degrees C. The depth profiles of Li-6 were determined using the Thermal Neutron Depth Profiling (TNDP) technique. The results showed that diffusion of Li-6 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 Li-6 diffusion behaviour. However, the Li-6 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 Li-6 in tantalum and tungsten studied by the neutron depth profiling technique Difúze 6- Li v tantalu a wolframu studovaná pomocí neutronového hloubkového profilování (cs) Diffusion of Li-6 in tantalum and tungsten studied by the neutron depth profiling technique (en)
skos:prefLabel	Diffusion of Li-6 in tantalum and tungsten studied by the neutron depth profiling technique Difúze 6- Li v tantalu a wolframu studovaná pomocí neutronového hloubkového profilování (cs) Diffusion of Li-6 in tantalum and tungsten studied by the neutron depth profiling technique (en)
skos:notation	RIV/61389005:_____/05:00042956!RIV07-AV0-61389005
http://linked.open.../vavai/riv/strany	485;490
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA202/03/0891), 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 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	518101
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/05:00042956
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	diffusion; lithium; tantalum (en)
http://linked.open.../riv/klicoveSlovo	lithium tantalum diffusion
http://linked.open...odStatuVydavatele	CH - Švýcarská konfederace
http://linked.open...ontrolniKodProRIV	[8CD7BD30F81C]
http://linked.open...i/riv/nazevZdroje	Defect and Diffusion Forum
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Research centre using thermal neutrons Diffusion of He, Li, Be and B in ISOL targets studied with the neutron depth profiling technique
http://linked.open...UplatneniVysledku	2005
http://linked.open...v/svazekPeriodika	237-240
http://linked.open...iv/tvurceVysledku	Hnatowicz, 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	1012-0386
number of pages	6 (xsd:int)

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