Status report on long-time decay measurements of 137Cs radioisotope

The constancy of nuclear decay rates can be investigated via long-duration precision measurements. It is still an open question whether any (annual) modulation can be observed. Long-lasting nuclear decay rate measurements have been the subject of considerable research effort. A decay rate measuremen...

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Bibliographic Details
Main Authors Fenyvesi, Edit, Kiss, Gábor Gyula, Molnár, Dénes, Lévai, Péter, Barnaföldi, Gergely Gábor
Format Journal Article
LanguageEnglish
Published 30.08.2024
Subjects
Physics - Nuclear Experiment
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Summary:The constancy of nuclear decay rates can be investigated via long-duration precision measurements. It is still an open question whether any (annual) modulation can be observed. Long-lasting nuclear decay rate measurements have been the subject of considerable research effort. A decay rate measurement with a 137Cs source is currently being conducted 30 meters below the ground at the Jánossy Underground Research Laboratory (JURLab, Csillebérc, Hungary) utilizing a High-purity Germanium (HPGe) detector. The laboratory is the low-radiation-background part of the Vesztergombi High Energy Laboratory (VLAB) on the KFKI campus, Csillebérc, Hungary. From October 2022 to April 2024, data of 18 months' worth have been collected, providing a new opportunity to look for variations in decay rates. The experimental setup, data processing method, and the first results of this measurement are presented here.
DOI:10.48550/arxiv.2409.00182