Study of natural radiation and characterization in brazilian soil

• Grant number: 07/04663-3
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2008
• End date: March 31, 2010
• Field of knowledge: Physical Sciences and Mathematics - Physics - Nuclear Physics
• Principal Investigator: Marcilei Aparecida Guazzelli
• Grantee: Marcilei Aparecida Guazzelli
• Host Institution: Centro Universitário FEI (UNIFEI). Campus de São Bernardo do Campo. São Bernardo do Campo , SP, Brazil

Abstract

This project of research aims the study of the distribution of soil natural activity. The analysis will be performed in the bordering places of the city of São Paulo, initiating with the study of the natural radiation in the city of São Bernardo do Campo, being later extended for other regions of the state of São Paulo. This research will supply the mapping of the natural radiation in several Brazilian regions. The contribution of the radiation will be evaluated to the dose mainly due to the isotope 40K, and the elements of the series of 238U and 232Th. The results will be compared with international average values of dose due to the external exposition to the gamma rays (0.48 mSv/yr) proceeding from terrestrial natural elements. With this project we intend to initiate a pioneering activity, of scientific and social importance, with the use of the gamma ray spectroscopy technique, in the Centro Universitário da FEI. The collaboration with the Instituto de Física da USP will make possible the transference of knowledge and scientific support in this specific area, in which already posses wide experience. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GUAZZELLI DA SILVEIRA, MARCILEI A.; PEREIRA, BRUNO RIBEIRO; MEDINA, NILBERTO H.; RIZZUTTO, MARCIA A.. Portable X-ray fluorescence system to measure Th and U concentrations. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, v. 189, p. 250-254, SEP 2018. (07/04663-3)

GUAZZELLI, M. A.; MEDINA, N. H.; AGUIAR, V. A. P.. Natural radioactivity and external hazard index in Brazilian sands. JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, v. 328, n. 3, p. 903-910, JUN 2021. (07/04663-3)