Radiation background from rock samples and hazards assessment: case of Mounana in Gabon

Autor:	Alain-Brice Moubissi, Maïk Delon Mboumba, Patrice Ele Abiama, Philippe Ondo Meye, Sylvere Yannick Loemba Mouandza, G. H. Ben-Bolie, Thierry Blanchard Ekogo
Rok vydání:	2020
Předmět:	Wet weight Health Toxicology and Mutagenesis Analyser Public Health Environmental and Occupational Health chemistry.chemical_element Soil science Radon Radiation Effective dose (radiation) chemistry Activity concentration Environmental science Natural radioactivity Background radiation
Zdroj:	International Journal of Low Radiation. 11:259
ISSN:	1741-9190 1477-6545
DOI:	10.1504/ijlr.2020.10036048
Popis:	The aim in this present work is to determine the specific activities of 226Ra, 232Th and 40K in rock samples collected from Mounana in Gabon, to assess the contribution of natural radioactivity. A p-type high-purity germanium detector has been coupled with a multichannel analyser DSA-1000 to perform measurements and data processing. The energy resolution of the 1332 keV60Co line is still found to be 1.8 keV at FWHM, with a relative efficiency of 30%. The specific activities average values of 226Ra, 232Th and 40K are 6554±198 Bq/kg, 63±12 Bq/kg and 513±93 Bq/kg, respectively wet weight. To assess the radiological risks due to 226Ra, 232Th and 40K, many parameters were estimated. The average value of annual effective dose was 18.95 mSv from the studied area. Rock from Mounana presents a high radioactivity, and we are planning to measure radon in homes to assess the risks of living in Mounana.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7812b72cacfefae35c3adf7a3a82f7b9 https://doi.org/10.1504/ijlr.2020.10036048 Zobrazit plný text záznamu