Strong Neutron-gamma Competition above the Neutron Threshold in the Decay of Co-70
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10333781" target="_blank" >RIV/00216208:11320/16:10333781 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevLett.117.142701" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.117.142701</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.117.142701" target="_blank" >10.1103/PhysRevLett.117.142701</a>
Alternative languages
Result language
angličtina
Original language name
Strong Neutron-gamma Competition above the Neutron Threshold in the Decay of Co-70
Original language description
The beta-decay intensity of Co-70 was measured for the first time using the technique of total absorption spectroscopy. The large beta-decay Q value [12.3( 3) MeV] offers a rare opportunity to study beta-decay properties in a broad energy range. Two surprising features were observed in the experimental results, namely, the large fragmentation of the beta intensity at high energies, as well as the strong competition between. rays and neutrons, up to more than 2 MeV above the neutron-separation energy. The data are compared to two theoretical calculations: the shell model and the quasiparticle random phase approximation (QRPA). Both models seem to be missing a significant strength at high excitation energies. Possible interpretations of this discrepancy are discussed. The shell model is used for a detailed nuclear structure interpretation and helps to explain the observed gamma-neutron competition. The comparison to the QRPA calculations is done as a means to test a model that provides global beta-decay properties for astrophysical calculations. Our work demonstrates the importance of performing detailed comparisons to experimental results, beyond the simple half-life comparisons. A realistic and robust description of the beta-decay intensity is crucial for our understanding of nuclear structure as well as of gamma-process nucleosynthesis.
Czech name
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Czech description
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Classification
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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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review Letters
ISSN
0031-9007
e-ISSN
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Volume of the periodical
117
Issue of the periodical within the volume
14
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
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UT code for WoS article
000385970600001
EID of the result in the Scopus database
2-s2.0-84992052317