Quenching of g(A) deduced from the beta-spectrum shape of Cd-113 measured with the COBRA experiment

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Quenching of g(A) deduced from the beta-spectrum shape of Cd-113 measured with the COBRA experiment

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Quenching of g(A) deduced from the beta-spectrum shape of Cd-113 measured with the COBRA experiment

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/EF16_013%2F0001733" target="_blank" >EF16_013/0001733: Podzemní laboratoř LSM - česká účast ve výzkumné infrastruktuře evropského významu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physics Letters B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

800

Číslo periodika v rámci svazku

135092

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

000503832500046

EID výsledku v databázi Scopus

2-s2.0-85075219536