About: Formation of the high-spin Hf-179m2 isomer in reactor irradiations

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About: Formation of the high-spin Hf-179m2 isomer in reactor irradiations Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The second isomer (T-1/2 = 25.1 d) in Hf-179 is one of a number of nuclear states that is interesting from the point of view of triggering a release of %22clean%22 nuclear energy because it stores a specific energy of about 0.5 MJ/mg. The yield of this isomer in nuclear reactions is restricted due to its high spin, I-pi = 25/2(-). The productivity of previously known methods was enough for the creation of experimental amounts but not for potential applications. In this paper, we show that irradiations in a reactor by the fast neutron flux within the fission spectrum are useful for the accumulation of Hf-179m2 in an amount of 10(16) nuclei. In an experiment performed in the Dubna IBR-2 reactor, the yield, cross-section sigma(m), and isomer-to-ground state ratio sigma(m)/sigma(g) were measured for the Hf-179(n, n,gamma)Hf-179m2 reaction. The systematics of the sigma(m)/sigma(g) values deduced from the experimental data available for this isomer are discussed. The second isomer (T-1/2 = 25.1 d) in Hf-179 is one of a number of nuclear states that is interesting from the point of view of triggering a release of %22clean%22 nuclear energy because it stores a specific energy of about 0.5 MJ/mg. The yield of this isomer in nuclear reactions is restricted due to its high spin, I-pi = 25/2(-). The productivity of previously known methods was enough for the creation of experimental amounts but not for potential applications. In this paper, we show that irradiations in a reactor by the fast neutron flux within the fission spectrum are useful for the accumulation of Hf-179m2 in an amount of 10(16) nuclei. In an experiment performed in the Dubna IBR-2 reactor, the yield, cross-section sigma(m), and isomer-to-ground state ratio sigma(m)/sigma(g) were measured for the Hf-179(n, n,gamma)Hf-179m2 reaction. The systematics of the sigma(m)/sigma(g) values deduced from the experimental data available for this isomer are discussed. (en) V experimentu uskutečněném na dubněnském reaktoru IBR-2 jsou měřeny výtěžky , účinné průřezy a poměry izomer-základní stav pro reakce Hf-179(n, n gama)-Hf179m. (cs)
Title	Formation of the high-spin Hf-179m2 isomer in reactor irradiations Formation of the high-spin Hf-179m2 isomer in reactor irradiations (en) Vytváření vysocespinového izomeru Hf-179m2 ozařováními v reaktoru (cs)
skos:prefLabel	Formation of the high-spin Hf-179m2 isomer in reactor irradiations Formation of the high-spin Hf-179m2 isomer in reactor irradiations (en) Vytváření vysocespinového izomeru Hf-179m2 ozařováními v reaktoru (cs)
skos:notation	RIV/61389005:_____/04:00105619!RIV/2005/MSM/A49005/N
http://linked.open.../vavai/riv/strany	438;441
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(ME 134)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2005
http://linked.open...aciTvurceVysledku	Adam, Jindřich
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	564721
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/04:00105619
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	reactor irradiation; high-spin Hf-179m2 (en)
http://linked.open.../riv/klicoveSlovo	high-spin Hf-179m2 reactor irradiation
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[342AF1482D6C]
http://linked.open...i/riv/nazevZdroje	Laser Physics
http://linked.open...in/vavai/riv/obor	BG
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	http://linked.opendata.cz/resource/domain/vavai/projekt/ME%20134
http://linked.open...UplatneniVysledku	2004
http://linked.open...v/svazekPeriodika	14
http://linked.open...iv/tvurceVysledku	Adam, Jindřich Karamian, S. A. Caroll, J. J. Kulagin, E. N. Shabalin, E. P.
issn	1054-660X
number of pages	4 (xsd:int)

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