Quenching of gA deduced from the β-spectrum shape of 113Cd measured with the COBRA experiment
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 str...
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Elsevier
2020-01-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269319308147 |
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doaj-c64369be09e94a54829063693cd3b3d92020-11-25T00:36:58ZengElsevierPhysics Letters B0370-26932020-01-01800Quenching of gA deduced from the β-spectrum shape of 113Cd measured with the COBRA experimentLucas Bodenstein-Dresler0Yingjie Chu1Daniel Gehre2Claus Gößling3Arne Heimbold4Christian Herrmann5Rastislav Hodak6Joel Kostensalo7Kevin Kröninger8Julia Küttler9Christian Nitsch10Thomas Quante11Ekaterina Rukhadze12Ivan Stekl13Jouni Suhonen14Jan Tebrügge15Robert Temminghoff16Juliane Volkmer17Stefan Zatschler18Kai Zuber19TU Dortmund, Lehrstuhl für Experimentelle Physik IV, Otto-Hahn-Str. 4a, 44221 Dortmund, GermanyTU Dresden, Institut für Kern- und Teilchenphysik, Zellescher Weg 19, 01069 Dresden, GermanyTU Dresden, Institut für Kern- und Teilchenphysik, Zellescher Weg 19, 01069 Dresden, GermanyTU Dortmund, Lehrstuhl für Experimentelle Physik IV, Otto-Hahn-Str. 4a, 44221 Dortmund, GermanyTU Dresden, Institut für Kern- und Teilchenphysik, Zellescher Weg 19, 01069 Dresden, GermanyTU Dortmund, Lehrstuhl für Experimentelle Physik IV, Otto-Hahn-Str. 4a, 44221 Dortmund, GermanyCTU Prague, Institute of Experimental and Applied Physics, CZ-11000 Prague, Czech RepublicUniversity of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, FinlandTU Dortmund, Lehrstuhl für Experimentelle Physik IV, Otto-Hahn-Str. 4a, 44221 Dortmund, GermanyTU Dresden, Institut für Kern- und Teilchenphysik, Zellescher Weg 19, 01069 Dresden, GermanyTU Dortmund, Lehrstuhl für Experimentelle Physik IV, Otto-Hahn-Str. 4a, 44221 Dortmund, GermanyTU Dortmund, Lehrstuhl für Experimentelle Physik IV, Otto-Hahn-Str. 4a, 44221 Dortmund, GermanyCTU Prague, Institute of Experimental and Applied Physics, CZ-11000 Prague, Czech RepublicCTU Prague, Institute of Experimental and Applied Physics, CZ-11000 Prague, Czech RepublicUniversity of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014, FinlandTU Dortmund, Lehrstuhl für Experimentelle Physik IV, Otto-Hahn-Str. 4a, 44221 Dortmund, GermanyTU Dortmund, Lehrstuhl für Experimentelle Physik IV, Otto-Hahn-Str. 4a, 44221 Dortmund, GermanyTU Dresden, Institut für Kern- und Teilchenphysik, Zellescher Weg 19, 01069 Dresden, GermanyTU Dresden, Institut für Kern- und Teilchenphysik, Zellescher Weg 19, 01069 Dresden, Germany; Corresponding author.TU Dresden, Institut für Kern- und Teilchenphysik, Zellescher Weg 19, 01069 Dresden, GermanyA 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 g‾A(ISM)=0.915±0.007, g‾A(MQPM)=0.911±0.013 and g‾A(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. Keywords: 113Cd beta-decay, Axial-vector coupling, gA quenching, Spectrum-shape method, CdZnTe, COBRAhttp://www.sciencedirect.com/science/article/pii/S0370269319308147 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Lucas Bodenstein-Dresler Yingjie Chu Daniel Gehre Claus Gößling Arne Heimbold Christian Herrmann Rastislav Hodak Joel Kostensalo Kevin Kröninger Julia Küttler Christian Nitsch Thomas Quante Ekaterina Rukhadze Ivan Stekl Jouni Suhonen Jan Tebrügge Robert Temminghoff Juliane Volkmer Stefan Zatschler Kai Zuber |
| spellingShingle |
Lucas Bodenstein-Dresler Yingjie Chu Daniel Gehre Claus Gößling Arne Heimbold Christian Herrmann Rastislav Hodak Joel Kostensalo Kevin Kröninger Julia Küttler Christian Nitsch Thomas Quante Ekaterina Rukhadze Ivan Stekl Jouni Suhonen Jan Tebrügge Robert Temminghoff Juliane Volkmer Stefan Zatschler Kai Zuber Quenching of gA deduced from the β-spectrum shape of 113Cd measured with the COBRA experiment Physics Letters B |
| author_facet |
Lucas Bodenstein-Dresler Yingjie Chu Daniel Gehre Claus Gößling Arne Heimbold Christian Herrmann Rastislav Hodak Joel Kostensalo Kevin Kröninger Julia Küttler Christian Nitsch Thomas Quante Ekaterina Rukhadze Ivan Stekl Jouni Suhonen Jan Tebrügge Robert Temminghoff Juliane Volkmer Stefan Zatschler Kai Zuber |
| author_sort |
Lucas Bodenstein-Dresler |
| title |
Quenching of gA deduced from the β-spectrum shape of 113Cd measured with the COBRA experiment |
| title_short |
Quenching of gA deduced from the β-spectrum shape of 113Cd measured with the COBRA experiment |
| title_full |
Quenching of gA deduced from the β-spectrum shape of 113Cd measured with the COBRA experiment |
| title_fullStr |
Quenching of gA deduced from the β-spectrum shape of 113Cd measured with the COBRA experiment |
| title_full_unstemmed |
Quenching of gA deduced from the β-spectrum shape of 113Cd measured with the COBRA experiment |
| title_sort |
quenching of ga deduced from the β-spectrum shape of 113cd measured with the cobra experiment |
| publisher |
Elsevier |
| series |
Physics Letters B |
| issn |
0370-2693 |
| publishDate |
2020-01-01 |
| 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 g‾A(ISM)=0.915±0.007, g‾A(MQPM)=0.911±0.013 and g‾A(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. Keywords: 113Cd beta-decay, Axial-vector coupling, gA quenching, Spectrum-shape method, CdZnTe, COBRA |
| url |
http://www.sciencedirect.com/science/article/pii/S0370269319308147 |
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