STUK

Unfolding alpha-particle energy spectrum from a membrane air filter containing radon progeny

R. Pöllänen, T. Siiskonen

Radiation Measurements, Volume 70, November 2014, Pages 15–20

Abstract: An alpha spectrum containing peaks of radon progeny and measured from a membrane air filter in a vacuum using a high-resolution spectrometer was thoroughly analyzed. The goal was to find solutions to several pending issues in spectrum analysis that are prerequisites for an accurate spectrum unfolding. These include non-linear energy calibration, detailed peak shape (tailing) and alpha-electron coincidences. Monte Carlo simulations were used to assess the coincidence phenomena and to provide input to peak fitting. The methodology applied here for radon progeny can be used for other alpha-particle emitting radionuclides possibly present in the filter.