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Secondary γ Transitions in (159)Gd After Neutron Capture at Isolated Resonances
The (158)Gd(n,γ)(159)Gd reaction was studied at 12 isolated neutron resonances by the TOF method at the IBR-30 Fast Pulse Reactor at JINR Dubna. Totally 15 secondary γ transitions in (159)Gd were recorded in the range from 450 keV to 750 keV. Of these, six previously unseen transitions were placed o...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
[Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology
2000
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4878354/ https://www.ncbi.nlm.nih.gov/pubmed/27551604 http://dx.doi.org/10.6028/jres.105.024 |
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author | Posṕišil, S. Bečvář, F. Granja Bustamante, C. Kubašta, J. Telezhnikov, S. A. |
author_facet | Posṕišil, S. Bečvář, F. Granja Bustamante, C. Kubašta, J. Telezhnikov, S. A. |
author_sort | Posṕišil, S. |
collection | PubMed |
description | The (158)Gd(n,γ)(159)Gd reaction was studied at 12 isolated neutron resonances by the TOF method at the IBR-30 Fast Pulse Reactor at JINR Dubna. Totally 15 secondary γ transitions in (159)Gd were recorded in the range from 450 keV to 750 keV. Of these, six previously unseen transitions were placed on the established (159)Gd level scheme. The depopulation of strongly populated levels at 507.7 keV and 558.2 keV (the head and the first excited members of band 1/2(−) [521]) was observed for the first time. It was shown that the observed 507.7 keV γ line, masked by the annihilation peak, originates from an unresolved doublet of transitions from the 507.7 keV level to the ground state and from the 558.2 keV level to the level at 50.7 keV. The 507.7 keV level decays exclusively to the ground state, while the 558.2 keV level decays via two transitions with a branching ratio that agrees well with the prediction according to Alaga’s rule. |
format | Online Article Text |
id | pubmed-4878354 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2000 |
publisher | [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology |
record_format | MEDLINE/PubMed |
spelling | pubmed-48783542016-08-22 Secondary γ Transitions in (159)Gd After Neutron Capture at Isolated Resonances Posṕišil, S. Bečvář, F. Granja Bustamante, C. Kubašta, J. Telezhnikov, S. A. J Res Natl Inst Stand Technol Article The (158)Gd(n,γ)(159)Gd reaction was studied at 12 isolated neutron resonances by the TOF method at the IBR-30 Fast Pulse Reactor at JINR Dubna. Totally 15 secondary γ transitions in (159)Gd were recorded in the range from 450 keV to 750 keV. Of these, six previously unseen transitions were placed on the established (159)Gd level scheme. The depopulation of strongly populated levels at 507.7 keV and 558.2 keV (the head and the first excited members of band 1/2(−) [521]) was observed for the first time. It was shown that the observed 507.7 keV γ line, masked by the annihilation peak, originates from an unresolved doublet of transitions from the 507.7 keV level to the ground state and from the 558.2 keV level to the level at 50.7 keV. The 507.7 keV level decays exclusively to the ground state, while the 558.2 keV level decays via two transitions with a branching ratio that agrees well with the prediction according to Alaga’s rule. [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology 2000 2000-02-01 /pmc/articles/PMC4878354/ /pubmed/27551604 http://dx.doi.org/10.6028/jres.105.024 Text en https://creativecommons.org/publicdomain/zero/1.0/ The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright. |
spellingShingle | Article Posṕišil, S. Bečvář, F. Granja Bustamante, C. Kubašta, J. Telezhnikov, S. A. Secondary γ Transitions in (159)Gd After Neutron Capture at Isolated Resonances |
title | Secondary γ Transitions in (159)Gd After Neutron Capture at Isolated Resonances |
title_full | Secondary γ Transitions in (159)Gd After Neutron Capture at Isolated Resonances |
title_fullStr | Secondary γ Transitions in (159)Gd After Neutron Capture at Isolated Resonances |
title_full_unstemmed | Secondary γ Transitions in (159)Gd After Neutron Capture at Isolated Resonances |
title_short | Secondary γ Transitions in (159)Gd After Neutron Capture at Isolated Resonances |
title_sort | secondary γ transitions in (159)gd after neutron capture at isolated resonances |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4878354/ https://www.ncbi.nlm.nih.gov/pubmed/27551604 http://dx.doi.org/10.6028/jres.105.024 |
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