Natural Radiation and Radioactivity in China

Ziqiang, Pan; Yin, Yang; Mingqiang, Guo

doi:10.1093/oxfordjournals.rpd.a080236

Cited by 65 publications

(8 citation statements)

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“…The av er age level of ra dio ac tiv ity of 232 Th in the pres ent study was found to be higher than those of the other re gional stud ies of Ban gla desh [19,20,22,23] ex cept for the one con ducted in North ern Dis tricts [21], Gudalore (In dia) [25], Pa ki stan [30][31][32][33][34][35][36], Sri Lanka [17], Sichuan (China) [37], Tai wan [39], Songkhla (Thai land) [40], in one study of Ma lay sia [42], Viet nam [44], Juban (Ye men) [45], Tafila (Jordan) [47], Saudi Ara bia [48][49][50][51][52], Mazandaran (Iran) [53], four lo cal stud ies of Tur key (Marmara, Kirklareli, Izmir, and Bursa) [56][57][58][59], Tri poli (Libya) [60], Egypt [61][62][63][64], Ni ge ria [66], Ser bia and Montenegro [68], Ire land [69], Caceres (Spain) [70], Hun gary [71], Cy prus [72], Lou i si ana (USA) [73] and also the world av er age [18] value; lower than those of Ooty (In dia)…”

Section: Con Cen Tra Tion Of Nat U Ral and Anthropogenic Radionuclide...mentioning

confidence: 85%

Radiological assessment of the surface soil of Bangladesh

Chakraborty

2014

NUCL TECH RAD PROT

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The specific activities of 232Th, 238U, 40K, and 137Cs in undisturbed surface soil at 56 locations of Bangladesh, covering its entire area, were measured using high resolution HPGe detector. The mean specific activity concentrations of the mentioned radionuclides were respectively found to be 83.56 ? 17.96 Bq/kg, 44.35 ? 12.65 Bq/kg, 630.89 ? 173.85 Bq/kg, and 5.37 ? ? 4.87 Bq/kg. A good correlation between the activities of 232Th and 238U was found. The radiological parameters namely radium equivalent activity, representative level index, external hazard index, internal hazard index, absorbed dose rate, and effective annual outdoor dose rate due to the natural radionuclides were also calculated. The average values of the mentioned parameters were found to be 212.26 ? 43.93 Bq/kg, 1.55 ? 0.32 Bq/kg, 0.29 ? 0.06, 0.69 ? 0.15, 97.27 ? 20.03 nGy/h, and 119.37 ? 24.58 mSv/y, respectively. The radiation dose levels at the points of sample collection were also measured by a portable radiation dose rate-meter. The average value of the outdoor dose rate was found to be 0.20 ? 0.07 mSv/h ranging from 0.16 ? 0.02 mSv/h to 0.28 ? 0.04 mSv/h. The distributions of natural radionuclides were found to be normal. The concentration levels of different radionuclides were comparable to the corresponding reported values of the soil of different countries.

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Section: Con Cen Tra Tion Of Nat U Ral and Anthropogenic Radionuclide...mentioning

confidence: 85%

Radiological assessment of the surface soil of Bangladesh

Chakraborty

2014

NUCL TECH RAD PROT

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“…Table 3 shows the comparison of radium equivalent Ra eq , representative level index I r , external hazard index H ex and radiation dose rate for rocks and soils from quaternary volcanism of Sana′a, Yemen, with the results in many countries (Bellia et al .,[ 11 ] Abbady,[ 21 ] Yaboah et al .,[ 22 ] Patra et al .,[ 12 ] Khaled,[ 23 ] Abdul Jabbar et al .,[ 24 ] Ziqiang et al .,[ 25 ] Malanca et al . [ 26 ] and Mustapha et al .…”

Section: Resultsmentioning

confidence: 99%

Specific activities of natural rocks and soils at quaternary intraplate volcanism north of Sana′a, Yemen

Harb¹,

El-Kamel²,

Abbady³

et al. 2012

J Med Phys

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The level of natural radioactivity in rocks and soil of 32 samples collected from locations at North Sana′a in Yemen was measured. Concentrations of radionuclides in rocks and soils samples were determined by gamma-ray spectrometer using high purity germanium (HPGe) detector with specially designed shield. The average radioactivity concentrations of 226Ra, 232Th, 40K were determined and expressed in Bq/kg. The results showed that these radionuclides were present in concentrations of 21.79 ± 3.1, 19.5 ± 2.6 and 399.3 ± 16 Bq/kg, respectively, for rocks. For soil, the corresponding values were 48.2 ± 4.4, 41.7 ± 4.5 and 939.1 ± 36 Bq/kg, respectively. Also, the radiological hazard of the natural radionuclide content, radium equivalent activity, total dose rates, external hazard index and gamma activity concentration index of the (rocks/soils) samples in the area under consideration were calculated. The dose rates at 1 m above the ground from terrestrial sources were 38.39 and 86.89 nGy/h for rocks and surface soil, respectively, which present no significant health hazards to humans.

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“…The reason for current interest is due to the fact that external radiation exposures from naturally occurring radionuclides materials (NORM) contribute, on average, of about 10% of the average annual dose to the human body from all radiation sources. It has been observed that naturally occurring radionuclides are present in soil [7] [8] [9] and sand which constitute a lived-in radioactive environment.…”

Section: Introductionmentioning

confidence: 99%

Study of Radionuclides and Radon Exhalation Rate in Soil and Sand Samples from Tiba, Luxor, Governorate

Negm¹,

Ahmed²,

Abbady³

et al. 2019

WJNST

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In this study, the natural radionuclides in soil and sand have been measured by using high purity germanium (HPGe) detector. While, radon exhalation rate has been measured by Alpha GUARD. The data analysis is performed to determine 226 Ra, 232 Th, and 40 K activity concentrations in addition to 222 Rn exhalation rate. The values of radium equivalent activity (R aeq), external hazard index (H ex), internal hazard index (H in), and absorbed dose rate were ranged from 46.46 to 124.16 Bq•kg −1 , 0.07 to 0.33 Bq•kg −1 , 0.09 to 0.42 Bq•kg −1 , and 13.24 to 58.37 nGy•h −1 respectively in all samples. The area and mass exhalation rates were increased from 9.16 ± 2.83 to 16.18 ± 2.83 Bq•m −2 •h −1 and 1.8 ± 1.34 to 11.35 ± 0.98 Bq•kg −1 •h −1 respectively.

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Natural Radiation and Radioactivity in China

Cited by 65 publications

References 0 publications

Radiological assessment of the surface soil of Bangladesh

Radiological assessment of the surface soil of Bangladesh

Specific activities of natural rocks and soils at quaternary intraplate volcanism north of Sana′a, Yemen

Study of Radionuclides and Radon Exhalation Rate in Soil and Sand Samples from Tiba, Luxor, Governorate

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