Radiation hazard indices of soil and water samples in Northern Malaysian Peninsula

Measurement of natural radioactivity and assessment of radiation hazard indices in soil samples at Pengerang, Kota Tinggi, Johor

“…It is found that the six parameters for calculating the radiation hazard indices in this study are lower than some of reported values for countries like Nigeria, Jordan and China [17][18] [19]. The effective dose in present study is higher than the value reported by [13] [14].…”

Penentuan Kepekatan Radionuklid Tabii dan Indeks Bahaya Radiologi akibat Penggunaan Condisoil® ke atas Penanaman Hibiscus cannabinus (Kenaf)

“…Ra eq = C Ra-226 +1.47C + 0.077C K-40 (5) dengan C , C K akan menghasilkan kadar dos sinar gama yang sama (Almayahi et al 2012;Baretka & Matthew 1985). Nilai Ra eq perlu lebih rendah dari 370 Bq kg −1 bagi memastikan sesuatu bahan itu selamat untuk digunakan (NEA-OECD 1979 Selain daripada itu, perbandingan keputusan kajian ini dengan kajian lepas juga mendapati kepekatan aktiviti radionuklid tabii berada dalam julat yang normal seperti yang ditunjukkan dalam Jadual 3.…”

Determination of Concentrations of Natural Radionuclides in Soils and Water in Non-cultivated Sites in Seberang Perai, Malaysia

“…Table 3 compresses the natural radioactivity levels for all sort of water acquired in some world regions and this study. For instance, the mean value of 226 Ra from Yemen is roughly lower than those values [20] and Northern Malaysian Peninsula [10], and lower than that from Nigeria and Sudan [21,22] …”

“…Every sample was weighed and stocked in a standard Marinella beaker, and after that the standard Marinella beaker was shut utilizing a standard electrical tape. All samples were kept for around 30 days before numbering to accomplish radioactive secular equilibrium for 238 U and 232 Th with their correspondent progeny [10,11]. All soil samples were set on the HPGe detector for 24h.…”

“…Eu sources at energies from 59.54 keV to 1408.30 keV from the International Atomic Energy Agency, set no. 34 (8 radioactive sources) [10]. The absolute efficiency of the HPGe detector for gamma-ray line was assessed from the formula below:…”