http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Y.D. Bachama (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Evaluation of elemental concentrations of uranium, thorium and potassium in top soils from Kuwait
A.D. Bajoga,A.N. Al-Dabbous,A.S. Abdullahi,N.A. Alazemi,Y.D. Bachama,S.O. Alaswad 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.6
Top soil samples across the state of Kuwait numering ninety were collected and analysed using gammarayspectrometry, to evaluate the elemental concentration of 238U, 232Th and 40K and their depletion/enrichment. Results of elemental concentration ranges from 0.48 to 2.61 mg/kg, 0.87e5.23 mg/kg, and0.24e2.23%, with a mean values of 1.39 mg/kg, 3.47 mg/kg, and 1.18%, for the 238U, 232Th and 40K,respectively. Further analysis was conducted amongst the five identified soil types, i.e. Aquisalids (S1),Calcigypsids (S2), Petrocalcids (S3), Petrogypsids (S4), and torripsamment (S5). The highest radioactivityconcentrations from both uranium and thorium were recorded in the S2 (Calcigypsids) soil, with a valueof 1.71 (mg/kg) and 4.45 (mg/kg), respectively. Minimum and maximum values of 40K are 1.1(%) and1.27(%) and is prevalent in Aquisalids (S1) and Petrocalcids (S3) soil types, respectively. Ratios of elementalconcentration for 232Th/238U, 40K/238U, 40K/232Th across the soil types are 2.53, 0.09 and 0.03, with acorrelation coefficient of 0.92, 0.34, and 0.38, respectively. A progressively higher 232Th/238U ratio isobserved moving south-wards, indicating lower 238U content in soils from the south relative to thenorthern part. Overall results indicate Kuwait to be relatively an area with low level of naturalradioactivity.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
