Production of long-lived hafnium isomers in reactor irradiations
Result description
Experiments on production of long-lived Hf isomer in reactor irradiation are described. Properties of this nuclide are promissing for its potential application as a relatively safe power source characterized by high density of a accumulated energy. MetalHf samples were activated in the Dubna IBR-2 reactor at positions corresponding to different neutron fluxes. Samples were bare or shielded by Cd and B C layers. The gamma activity of the samples was analyzed with Ge gamma spectrometers during a two-yearperiod following their irradiation. In the presence of dominant activation products Hf and Hf, the high-spin isomers Hf and Hf are also detected despite relatively low levels. The isomer-to-ground state reactins and cross-sections were determined from the measured yields. For Hf, the cross-section for burnup (destruction) by neutron capture after its production was also estimated, clarifying the results from earlier experiments.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Production of long-lived hafnium isomers in reactor irradiations
Original language description
Experiments on production of long-lived Hf isomer in reactor irradiation are described. Properties of this nuclide are promissing for its potential application as a relatively safe power source characterized by high density of a accumulated energy. MetalHf samples were activated in the Dubna IBR-2 reactor at positions corresponding to different neutron fluxes. Samples were bare or shielded by Cd and B C layers. The gamma activity of the samples was analyzed with Ge gamma spectrometers during a two-yearperiod following their irradiation. In the presence of dominant activation products Hf and Hf, the high-spin isomers Hf and Hf are also detected despite relatively low levels. The isomer-to-ground state reactins and cross-sections were determined from the measured yields. For Hf, the cross-section for burnup (destruction) by neutron capture after its production was also estimated, clarifying the results from earlier experiments.
Czech name
Produkce dlouhožijících isomerů ozařováním v reaktoru
Czech description
Vzorky Hf byly aktivovány v reaktoru IBR-2v SÚJV Dubna.Byly stíněny Cd a B4C filtrem a bez filtru byly umístěny v různých neutronových tocích.Spektry gama se měřily během dvou let.
Classification
Type
Jx - 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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Result continuities
Project
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2006
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
High energy density physics
ISSN
1574-1818
e-ISSN
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Volume of the periodical
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Issue of the periodical within the volume
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Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
48-56
UT code for WoS article
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EID of the result in the Scopus database
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Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BG - Nuclear, atomic and molecular physics, accelerators
Year of implementation
2006