Radiochemical separation of 7Be from the cooling water of the neutron spallation source SINQ at PSI
Radiochemical separation of 7Be from the cooling water of the neutron spallation source SINQ at PSI
复制标题
PSI 下中子散裂源 SINQ 冷却水中的 7Be 放射化学分离
DOI：
--
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
D. Schuermann
中科院分区：
文献类型：
--
作者：
D. Schumann;M. Ayranov;T. Stowasser;L. Gialanella;A. Di Leva;M. Romano;D. Schuermann
7Be是研究若干天体物理过程和现象的关键放射性核素。此外，它还可用作磨损测量中的示踪剂。在PSI的中子感生中子源（SINQ）设施的冷却水（D2O）中，通过16 O与所产生的快中子的中子反应产生了大量的16 O。安装含有100 mL混合床离子交换器LEWATIT的屏蔽离子交换过滤器，作为冷却水进入SINQ冷却回路的旁路，持续3个月。收集到的7Be活度在几百GBq的范围内。此外，在使用安装的分离系统远程控制的热室中分离和纯化7Be。除了10Be之外，放射性副产物可以忽略不计，因此这种冷却水可以作为高活性7Be样品的理想来源。该设施能够生产7Be，每年的放射性活度高达1 TBq。详细介绍了7Be样品的制备方法，并讨论了其可能的用途。特别是一些初步的结果7Be离子束生产。
Summary 7Be is a key radionuclide for investigation of several astrophysical processes and phenomena. In addition, it is used as a tracer in wear measurements. It is produced in considerable amounts in the cooling water (D2O) of the Spallation Induced Neutron Source (SINQ) facility at PSI by spallation reactions on 16O with the generated fast neutrons. A shielded ion-exchange filter containing 100 mL of the mixed-bed ion exchanger LEWATIT was installed as a bypass for the cooling water into the cooling loop of SINQ for three months. The collected activity of 7Be was in the range of several hundred GBq. Further, the 7Be was separated and purified in a hot-cell remotely-controlled using a separation system installed. With the exception of 10Be, radioactive byproducts can be neglected, so that this cooling water could serve as an ideal source for highly active 7Be-samples. The facility is capable of producing 7Be with activities up to 1 TBq per year. The 7Be sample preparation is described in detail and the possible uses are discussed. In particular some preliminary results of 7Be ion beam production are presented.