Zhang B.,Capital Normal University |
Zhang B.,Resource Environment and Geographic Information System Beijing Key Laboratory |
Zhang B.,State Key Laboratory Cultivation Base Urban Environment Process and DigitalModule |
Wei M.-J.,Capital Normal University |
And 14 more authors.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2012
The accurate measurement of equivalent doses is the key to the dating of debris flow samples. Using different radiation intervals measure debris flow material samples, the equivalent doses obtained are different, indicating irradiation interval impacts the equivalent dose of the debris flow material samples. Test debris flow samples used the known equivalent dose of 30 Gy, and measure them in different intervals of irradiation dosimetry. 2.5 Gy/min β-source ( 90Sr- 90Y) irradiation intervals were selected to 1, 2, 4, 6 min, the equivalent dose obtained respectively 19.3, 22.3, 26.4, 23.0 Gy; 8 Gy/ min of β source ( 90Sr- 90Y) irradiation intervals were selected to 0.5, 1, 1.5, 2 min, the equivalent dose obtained respectively 17.6, 19.6, 25.3, 15.6 Gy. The research indicate that he most suitable irradiation interval which by the dose rate 2.5 Gy/min of the β source ( 90Sr- 90Y)measure the debris flow material is 4 min. And the most suitable irradiation interval which by the dose rate 8 Gy/min of the β source ( 90Sr- 90Y) measure the debris flow material is 1.5 min.