论文部分内容阅读
本工作利用仪器中子活化分析法,采用不同的照射时间和冷却时间,对十二个水系沉积物标准(代号为GSD1～12)中8～10个稀土元素进行测定,给出各标样的稀土元素的球粒陨石标准化分布模式,并试论了部分标样中稀土元素的物质来源。 5分钟照射,冷却2个小时进行测量,可测得元素Dy。10～15个小时照射,冷却4天、12天、30天进行测量,可测得元素:La、Ce、Nd、Sm、Eu、Tb、Yb、Lu。72小时照射,冷却200天进行测量,可测得元素
In this work, eight to ten rare earth elements in twelve sediments of water system (code: GSD1-12) were measured by neutron activation analysis using different irradiation time and cooling time. Rare earth element chondrite normalized distribution model, and discusses some of the standard sample rare earth elements of the material source. 5 minutes irradiation, cooling 2 hours to measure the element Dy can be measured. The elements are La, Ce, Nd, Sm, Eu, Tb, Yb and Lu measured after 10-15 hours of irradiation, cooling for 4 days, 12 days and 30 days. 72 hours irradiation, cooling 200 days to measure, measurable elements