Quenching of g(A) deduced from the beta-spectrum shape of Cd-113 measured with the COBRA experiment
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F20%3A00337085" target="_blank" >RIV/68407700:21670/20:00337085 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.physletb.2019.135092" target="_blank" >https://doi.org/10.1016/j.physletb.2019.135092</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.physletb.2019.135092" target="_blank" >10.1016/j.physletb.2019.135092</a>
Alternative languages
Result language
angličtina
Original language name
Quenching of g(A) deduced from the beta-spectrum shape of Cd-113 measured with the COBRA experiment
Original language description
A dedicated study of the quenching of the weak axial-vector coupling strength gA in nuclear processes has been performed by the COBRA collaboration. This investigation is driven by nuclear model calculations which show that the β-spectrum shape of the fourfold forbidden non-unique decay of 113Cd strongly depends on the effective value of gA. Using an array of CdZnTe semiconductor detectors, 45 independent 113Cd spectra were obtained and interpreted in the context of three nuclear models. The resulting effective mean values are gA(ISM)=0.915±0.007, gA(MQPM)=0.911±0.013 and gA(IBFM-2)=0.955±0.022. These values agree well within the determined uncertainties and deviate significantly from the free value of gA. This can be seen as a first step towards answering the long-standing question regarding quenching effects related to gA in low-energy nuclear processes.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
<a href="/en/project/EF16_013%2F0001733" target="_blank" >EF16_013/0001733: Underground laboratory LSM - Czech participation to European-level research</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics Letters B
ISSN
0370-2693
e-ISSN
1873-2445
Volume of the periodical
800
Issue of the periodical within the volume
135092
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
11
Pages from-to
1-11
UT code for WoS article
000503832500046
EID of the result in the Scopus database
2-s2.0-85075219536