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

Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Formation of the high-spin Hf-179m2 isomer in reactor irradiations
Original language 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 "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.
Czech name
Vytváření vysocespinového izomeru Hf-179m2 ozařováními v reaktoru
Czech description
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.

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Project
<a href="/en/project/ME%20134" target="_blank" >ME 134: Cooperation of Czech Republic with JINR Dubna in the theoretical and nuclear physics and application of nuclear methods in other fields</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2004
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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