An algorithm for filtering detector instabilities in search of novel non exponential decay and in conventional half-life determinations

作者：Hitt G W^*; Goddard B; Solodov A A; Bridi D; Isakovic A F; El Khazali R

来源：Applied Radiation and Isotopes, 2017, 127: 179-185.

DOI：10.1016/j.apradiso.2017.05.025

• Radioactivity
• Geiger-Muller tube
• Total efficiency correction
• Half-life
• Tl-204
• Beta decay
• Decay rate fluctuations
• Earth-Sun distance

Recent reports of Solar modulation of beta-decay have reignited interest in whether or not radioactive half-lives are constants. A numerical approach for filtering instrumental effects on residuals is developed, using correlations with atmospheric conditions recorded while counting Tl-204 emissions with a Geiger-Miiller counter. Halflife oscillations and detection efficiency oscillations can be separated provided their periods are substantially different. A partial uncertainty budget for the Tl-204 half-life shows significant decreases to medium-frequency instabilities correlated with pressure and temperature, which suggests that further development may aid general improvements in half-life determinations.

• 出版日期2017-9