| Yu Tao,Liu Jing,Ren Jiong,Hao Yuhui,Li Rong.Rapid identification of low activity of depleted uranium using portable γ -spectrometer[J].Chinese Journal of Radiological Medicine and Protection,2015,35(3):217-221 |
| Rapid identification of low activity of depleted uranium using portable γ -spectrometer |
| Received:August 07, 2014 |
| DOI：10.3760/cma.j.issn.0254-5098.2015.03.014 |
| KeyWords:Portable γ spectrometer Depleted uranium Identification |
| FundProject:军队"十二五"重大项目(AwS11C 002-009) |
| Author Name | Affiliation | E-mail | | Yu Tao | Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, Chongqing 400038, China | | | Liu Jing | Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, Chongqing 400038, China | | | Ren Jiong | Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, Chongqing 400038, China | | | Hao Yuhui | Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, Chongqing 400038, China | | | Li Rong | Institute of Combined Injury, State Key Laboratory of Trauma, Burn and Combined Injury, Chongqing Engineering Research Center for Nanomedicine, College of Preventive Medicine, Third Military Medical University, Chongqing 400038, China | lirongyl@sina.com |
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| Abstract:: |
| Objective To explore the feasibility of using portable γ spectrometer to rapidly identify the low activity of depleted uranium and the underlying conditions.Methods Firstly, high purity germanium (Ge) γ spectrometer was used to analyze energy spectrum of DU samples (5 g) and calculate nuclide percentage of 235U in an attempt to ascertain the properties of these DU samples. The portable γ spectrometer was used to provide the evidences for identification of DU samples. Secondly, portable γ spectrometer was also used to identify DU samples of same group. These samples contain 1 g DU powder and 0-5 g environmental clay powder, which were sealed with double layer pocket, and then detected with a distance of 1-5 cm during the longest detection time of 10 min. According to the detection of nuclide activity of 238U and 235U in the samples and the subsequent calculation of specific activity, the nuclide percentage composition was calculated and the existence of DU was confirmed if this value of 235U was less than 0.718%.Results The activity of 238U was detected using portable γ spectrometer under all test conditions, while the activity of 235U was detectable only under certain test conditions (MA≥1 g, DN≤1 cm). Under the condition that the 238U and 235U was both detected, the nuclide percentage of 235U was all less than 0.718%, which suggested that the DU was confirmed.Conclusions The energy spectrum of low activity of DU and the type of nuclide could rapidly be identified and evaluated by using portable γ spectrometer. This is same as the conclusions obtained with high purity Ge γ spectrometer, α spectrometer and ICP-MS. |
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