Determination of 226Ra, 232Th, 40K, 235U and 238U activity concentration and public dose assessment in soil samples from bauxite core deposits in Western Cameroon

The goal of this study was to establish the first baseline measurements for radioactivity concentration of the artificial radionuclide [Formula: see text]Cs in soil samples collected from the Qatarian peninsula. The work focused on the determination of the activity concentrations levels of man-made radiation in 129 soil samples collected across the landscape of the State of Qatar. All the samples were collected before the most recent accident in Japan, “the 2011 Fukushima Dai-ichi nuclear power plant accident”. The activity concentrations have been measured via high-resolution gamma-ray spectrometry using a hyper-pure germanium detector situated in a low-background environment with a copper inner-plated passive lead shield. A radiological map showing the activity concentrations of [Formula: see text]Cs is presented in this work. The concentration was[Formula: see text]found to range from 0.21 to 15.41 Bq/kg. The highest activity concentration of [Formula: see text]Cs was observed in sample no. 26 in North of Qatar. The mean value was found to be around 2.15 ± 0.27 Bq/kg. These values lie within the expected range relative to the countries in the region. It is expected that this contamination is mainly due to the Chernobyl accident on 26 April 1986, but this conclusion cannot be confirmed because of the lack of data before this accident.

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Results of international comparison tests on determination of 137Cs activity concentration in soil samples

Radiatsionnaya Gygiena = Radiation Hygiene ◽

10.21514/1998-426x-2020-13-4-101-109 ◽

2020 ◽

Vol 13 (4) ◽

pp. 101-109

Author(s):

V. P. Ramzaev ◽

Ch. Bernhardsson ◽

A. A. Dvornik ◽

Zh. V. Bakarikova ◽

O. Karlberg ◽

...

Keyword(s):

International Comparison ◽

Activity Concentration ◽

Soil Samples

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DETERMINATION OF THE URANIUM CONTENT IN SOME SOIL SAMPLES FROM AJAOKUTA, KOGI STATE: NIGERIA

International Journal of Research -GRANTHAALAYAH ◽

10.29121/granthaalayah.v7.i9.2019.608 ◽

2019 ◽

Vol 7 (9) ◽

pp. 252-258

Author(s):

Aruwa Arome ◽

Philibus Musa Gyuk ◽

Achor Mathias Ogwo ◽

Isah Suleiman

Keyword(s):

Activity Concentration ◽

Pulse Height ◽

Uranium Content ◽

Mean Value ◽

Soil Samples ◽

Pulse Height Analyzer ◽

The World ◽

The Mean ◽

Good Agreement

This work present the Uranium (238U) content in soil samples collected in Ajaokuta from some villages was been determined. The measurement of the soil Uranium activity concentration were made using a multi–channel pulse height analyzer (Camberra series 10 plus) coupled to a 76.2mm x 76.2mm NaI (TI) scintillation detector. 2.93)The mean Uranium content in the analyzed samples was found to be (44.26 Bq/kg which is higher than the world mean value of 35Bq/kg. The results were in good agreement with others for soils from region which is considered as normal or slightly high in radioactivity level.

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Natural radioactivity and external dose assessment of surface soils in Bolikhamxay province, Laos

VNU Journal of Science Mathematics - Physics ◽

10.25073/2588-1124/vnumap.4224 ◽

2017 ◽

Vol 33 (4) ◽

Author(s):

Loat Bui Van

Keyword(s):

Activity Concentration ◽

Natural Radionuclides ◽

Soil Samples ◽

Dose Assessment ◽

World Average ◽

Average Value ◽

Activity Concentrations ◽

Radium Equivalent ◽

The World ◽

Average Activity

We have determined activity concentrations in 33 soil samples collected from Bolikhamxay Province, Laos. The activity concentrations of the natural radionuclides 226Ra,232Th and 40K in soil samples were measured by a gamma spectrometer with a HPGe detector. The average activity concentrations of the natural radionuclides 226Ra, 232Th and 40K are 43.8 ± 5.6, 57.0 ± 7.3 and 426.4 ± 23.1 Bq.kg-1, respectively. The average activity concentrations of 226Ra and 232Th in this work are higher than those of the world average values. Meanwhile, the activity concentration of 40 K is almost the same of the world average value. The estimated average outdoor annual effective dose (E) and radium equivalent actitvity (Raeq) are 0.17 ± 0.02 mSv.yr-1 and 154.8 ± 16.1 Bq.kg-1, respectively.

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