Study of ^222−220Rn Measurement Systems Based on Electrostatic Collection by Using Geant4+COMSOL Simulation

Abstract

Using Monte Carlo (with Geant4) and COMSOL simulations, the authors have defined a useful tool to reproduce the alpha spectroscopy of 222Rn, 220Rn and their ionized daughters by measurement systems based on electrostatic collection on a silicon detector, inside a metallic chamber. Several applications have been performed: (i) simulating commercial devices worldwide used, and comparing them with experimental theoretical results; (ii) studying of realization of new measurement systems through investigation of the detection efficiency versus different chamber geometries. New considerations and steps forward have been drawn. The present work is a novelty in the literature concerning this research framework.

Keywords

• radon detector
• electrostatic collection
• Monte Carlo simulation
• Geant4
• COMSOL
• detection efficiency