https://www.mdpi.com/1660-4601/19/24/16739
The article presents a model for simulating changes in the activity concentration of radon and thoron as well as their progeny in closed or poorly ventilated...
decay productsmodelingactivityconcentrationradon
https://arxiv.org/abs/0709.4440
Abstract page for arXiv paper 0709.4440: A clean, bright, and versatile source of neutron decay products
cleanbrightversatilesourceneutron