Vytváření vysocespinového izomeru Hf-179m2 ozařováními v reaktoru

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F04%3A00105619" target="_blank" >RIV/61389005:_____/04:00105619 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 "clean" 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 areactor 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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 "clean" 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 areactor 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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

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Projekt

<a href="/cs/project/ME%20134" target="_blank" >ME 134: Spolupráce ČR s SéJV Dubna v teoretické a jaderné fyzice a při využití jaderných metod v dalších oborech</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Laser Physics

ISSN

1054-660X

e-ISSN

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Svazek periodika

14

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

4

Strana od-do

438-441

Kód UT WoS článku

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EID výsledku v databázi Scopus

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