Related Experiment Video
Updated: Jun 12, 2026

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films
Published on: November 9, 2015
222Rn and 212Pb exposures at a Brazilian spa
M P Campos1, B R S Pecequilo, B P Mazzilli
1Instituto de Pesquisas Energéticas e Nucleares, Cidade Universitária, São Paulo, SP, Brazil. mpcampos@ipen.br
Abstract:
Termas de Araxá spa is located in Araxá, State of Minas Gerais. In this region, several minerals rich in uranium and thorium are found. The mineral waters and mud from Termas de Araxá spa have been used for therapeutic and recreation purposes. In this study, the committed effective dose was evaluated for workers and patients at Araxá spa due to (222)Rn and (212)Pb inhalation. Radon measurements were carried out through the passive method with solid state nuclear track detectors (Makrofol E) over a period of 21 months, with results varying from 258 +/- 20 to 1634 +/- 111 Bq m(-3). The (212)Pb air concentration was assessed through the modified Kusnetz's method, the results varying from 0.3 +/- 0.1 to 2.1 +/- 0.2 Bq m(-3). Doses received by the spa workers are below 20 mSv.y(-1), suggested by ICRP 60 as an annual effective dose limit for occupational exposure. The radiation doses for the patients are below the mean annual effective dose due to natural sources estimated to be 2.4 mSv.y(-1).
More Related Videos
Related Concept Videos
Nuclear Transmutation
Absorption of Radiation
Radioactivity and Nuclear Equations
A nuclide of an element has a specific number of protons and...
Atomic Absorption Spectroscopy: Radiation and Light Sources
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
Radiation: Applications
The average...
Radioactive Decay and Radiometric Dating

