Home / Scientific activities / Researches / ALPHA PARTICLES CONCENTRATIONS FROM SOME SOIL SAMPLES OF AL-NAJAF (IRAQ)

ALPHA PARTICLES CONCENTRATIONS FROM SOME SOIL SAMPLES OF AL-NAJAF (IRAQ)

1Abstract. Soil samples were collected from Al-Najaf governorate, Iraq; these samples were inves
tigated for radon concentrations using CN-85 detector, and for uranium concentrations assessment
CN-85 and CR-39 detectors were used. Also, some radiation parameters due to radon concentrations
were calculated. Radon concentrations were varied from 506.84 Bq·m
-3 to1194.69 Bq·m-3 with an
average of 894.21±77.80 Bq·m
-3, whereas the radium content were varied from 77.19 Bq·kg-1 to
181.95 Bq·kg
-1 with an average of 136.18±11.84 Bq·kg-1. The average values of the rate of radon
exhalation in terms of mass, in terms of area and the soil radon concentration contributing to indoor
radon activity were 1.01±0.08 Bq·kg
-1·h, 4.56±0.39 Bq·m-2·h and 18.24±1.58 Bq·m-3, respectively. It
is also found that the average value of effective dose equivalent, annual effective dose and absorbed
dose in soft tissues and in lungs were 0.084±0.007 WLM
·y-1 0.574±0.050 mSv·y-1, 0.090±0.007
nGy·h
-1 and 0.729±0.063 nGy·h-1, respectively. Among others, uranium concentration, using CN-85
and CR-39 detectors, were varied from 0.85 mg·kg
-1 to 2.0 mg·kg-1 with an average of 1.5±0.13
mg·kg
-1 and from 1.16 mg·kg-1 to 2.17 mg·kg-1 with an average of 1.5±0.13 mg·kg-1, respectively.
The correlation between the contribution of radon to indoor with radium content and uranium con
centrations of the two detectors (CN-85 and CR-39) was clear. Finally, the values of radon concen
trations, radium content, radon exhalation rate in terms of area, annual effective dose and uranium
concentrations in samples in this work were below the limits of the world average, so, according to
the results of the area under study, this would not pose a signifcant risk to human beings.
Keywords: Radon-222 concentration, radon exhalation rates, radium content, uranium concentra
tion, SSNT detector and Al-Najaf governorate

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