STUDY OF THE TIME DEPENDENCE OF RADIOACTIVITY

Authors

  • E Bellotti Universita delgi Studi di Milano Bicocca and Instituto Nazionale di Fisica Nucleare, Sezione di Milano, Milano
  • C. Broggini Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Padova
  • G. Di Carlo Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso, Assergi
  • M. Laubenstein Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso, Assergi
  • R. Menegazzo Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Padova

DOI:

https://doi.org/10.14311/AP.2013.53.0524

Abstract

The activity of a 137Cs source was measured using a germanium detector installed deep underground in the Gran Sasso Laboratory. In total about 5100 energy spectra, one hour measuring time each, were collected and used to search for time variations of the decay constant with periods from a few hours to 1 year. No signal with amplitude larger than 9.6 × 10−5 at 95% C.L. was detected. These limits are more than one order of magnitude lower than the values on the oscillation amplitude reported in the literature. The same data give a value of 29.96±0.08 years for the 137Cs half life, which is in good agreement with the world mean value of 30.05 ± 0.08 years.

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Published

2013-12-18

How to Cite

Bellotti, E., Broggini, C., Di Carlo, G., Laubenstein, M., & Menegazzo, R. (2013). STUDY OF THE TIME DEPENDENCE OF RADIOACTIVITY. Acta Polytechnica, 53(A), 524–527. https://doi.org/10.14311/AP.2013.53.0524

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Articles