Made available in DSpace on 2022-04-29T08:40:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-01-01; Radon gas (²²²Rn) after cigarette smoking, has been considered the leading cause of lung cancer in the United States, according to studies, 21,000 people die each year from gas inhalation. Thus, it is very important that radon concentrations be known indoors: residences, mines, galleries, among others. ...