Preliminary research on method of tree ring's NE-OBT measurement using AMS
文献类型：期刊论文
| 作者 | Ma, YH; He, M; Gao, J; Qin, LL; Deng, K; Liu, JY; Yang, G; Zhang, Q; Ma, ZW; Wei, F |
| 刊名 | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
 |
| 出版日期 | 2019 |
| 卷号 | 450页码:149-152 |
| 关键词 | ORGANICALLY BOUND TRITIUM CELLULOSE |
| ISSN号 | 0168-583X |
| DOI | 10.1016/j.nimb.2018.09.042 |
| 文献子类 | 期刊论文 |
| 英文摘要 | The non-exchangeable organically bound tritium (NE-OBT) concentration in the cellulose of tree rings can accurately reflects the tritiated water concentration in the local environment and often contains the only historical record of tritium exposure. However, there is few study about NE-OBT measurement using AMS around the world, especially in China. Furthermore, in order to measure tritium in tree rings exactly, it is necessary to solve several key problems during sample preparation. In this study, the optimized sample preparations procedure are investigated. The purity of cellulose extracted by improved sodium hypochlorite pretreatment method is about 83.9%, considerably higher than the 64.8% conventional methods. Pure TiH2 samples reaching requirements of AMS measurement have been made. The isotope fractionation is stabilized during sample preparation. Preliminary results of sample analysis using a compact AMS with 200 kV accelerator are presented. Currently, the minimum T/H ratio that can be accurately measured is only about 10(-12), limited by hydrogen contents in samples and instrument conditions. Further works will be done in order to achieve lower detection limits and better accuracy. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32167]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, 2019 Jialuo Highway, Shanghai, Peoples R China; 2.China Inst Atom Energy, POB 275-50, Beijing 102413, Peoples R China 3.Shanghai Tech Univ, 393 Middle Huaxia Rd, Shanghai, Peoples R China; 4.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Ma, YH,He, M,Gao, J,et al. Preliminary research on method of tree ring's NE-OBT measurement using AMS[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,2019,450:149-152. |
| APA | Ma, YH.,He, M.,Gao, J.,Qin, LL.,Deng, K.,...&Li, Y.(2019).Preliminary research on method of tree ring's NE-OBT measurement using AMS.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,450,149-152. |
| MLA | Ma, YH,et al."Preliminary research on method of tree ring's NE-OBT measurement using AMS".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 450(2019):149-152. |
入库方式： OAI收割
来源：上海应用物理研究所
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