Theoretical Simulation of Track Structure in Atmosphere Produced by 90Sr-90Y Source

The distribution of the decay electron tracks and spectra induced by ⁹⁰Sr-⁹⁰Y source were simulated with Monte-Carlo method. The track structures and spectra of decay electrons were compared with those of secondary electrons and bremsstrahlung photons, and the differences among them were analyzed. The simulation results may offer some theoretical references for radiation protection, shielding design and application studies of ⁹⁰Sr-⁹⁰Y source.