title: Natural and anthropogenic radioactivity levels and the associated radiation hazard in the soil of Oodalia Tea Estate in the hilly region of Fatickchari in Chittagong, Bangladesh.
abstract: Radioactivity in the soil of a tea garden in the Fatickchari area in Chittagong, Bangladesh, was measured using a high-resolution HPGe detector. The soil samples were collected from depths of up to 20 cm beneath the soil surface. The activity concentrations of naturally occurring (238)U and (232)Th were observed to be in the range of 27 ± 7 to 53 ± 8 Bq kg(-1) and 36 ± 11 to 72 ± 11 Bq kg(-1), respectively. The activity concentration of (40)K ranged from 201 ± 78 to 672 ± 81 Bq kg(-1), and the highest activity of fallout (137)Cs observed was 10 ± 1 Bq kg(-1). The average activity concentration observed for (238)U was 39 ± 8 Bq kg(-1), for (232)Th was 57 ± 11 Bq kg(-1), for (40)K was 384 ± 79 Bq kg(-1) and for (137)Cs was 5 ± 0.5 Bq kg(-1). The radiological hazard parameters (representative level index, radium equivalent activity, outdoor and indoor dose rates, outdoor and indoor annual effective dose equivalents, and radiation hazard index) were calculated from the radioactivity in the soil.
authors: Department of Computer Science and Engineering, BGC Trust University Bangladesh, Chandanaish, Chittagong, Bangladesh nabsar05@yahoo.com.
authors: Nurul
authors: N
authors: Absar
authors: Department of Physics, University of Chittagong, Bangladesh.
authors: M Mashiur
authors: MM
authors: Rahman
authors: Radioactivity Testing and Monitoring Laboratory, Bangladesh Atomic Energy Commission, Chittagong, Bangladesh.
authors: Masud
authors: M
authors: Kamal
authors: Department of Physics, University of Chittagong, Bangladesh.
authors: Naziba
authors: N
authors: Siddique
authors: Radioactivity Testing and Monitoring Laboratory, Bangladesh Atomic Energy Commission, Chittagong, Bangladesh.
authors: Mantazul Islam
authors: MI
authors: Chowdhury
mesh_terms: D000383:Agriculture; D001417:Background Radiation; D001459:Bangladesh; D028241:Camellia sinensis / Q000254:growth & development; D002588:Cesium Radioisotopes / Q000032:analysis; D006801:Humans; D016273:Occupational Exposure; D011197:Potassium Radioisotopes / Q000032:analysis; D011834:Radiation Monitoring; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D013794:Thallium Radioisotopes / Q000032:analysis; D014501:Uranium / Q000032:analysis
chemical_list: D002588:Cesium Radioisotopes; D011197:Potassium Radioisotopes; D012990:Soil Pollutants, Radioactive; D013794:Thallium Radioisotopes; D014501:Uranium
keywords: dose rate; high-purity germanium detector; radiation hazard; radioactivity; soil