How to do the Decay Correction Properly

Our paper examines isotopic activity ratios of radionuclides detected at radionuclide stations within the International Monitoring System (IMS) for the Comprehensive Nuclear-Test-Ban Treaty (CTBT). We focus on characterizing release events from underground nuclear explosions by analyzing radionuclide concentrations in air plumes sampled by IMS stations. The study investigates decay correction during sampling, using two approaches: interval constant concentration and decaying concentration. Our findings highlight the impact of these methods on isotopic activity ratios, particularly for radionuclides with short half-lives. Read the full paper here: https://www.doi.org/10.1007/s00024-025-03716-z