Zirconium as a multi-isotopic flux ratio monitor and a single comparator in reactor-neutron activation analysis
Zirconium as a multi-isotopic flux ratio monitor and a single comparator in reactor-neutron activation analysis
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锆作为反应堆中子活化分析中的多同位素通量比监测器和单一比较器
DOI：
10.1007/bf02518511
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发表时间：
1976
期刊：
影响因子：
--
通讯作者：
J. Hoste
中科院分区：
文献类型：
--
作者：
A. Simonits;F. Corte;J. Hoste
回顾了确定热中子通量与超热中子通量比的不同方法，并对常用监测材料和 Zr 同位素的核数据进行了列表。结果表明，当测量20<Φth/Φe<200范围内的Φth/Φe比率时，94Zr-96Zr同位素对的使用显着提高了精度。当应用单一比较器方法时，建议使用 94 Zr 同位素作为与 94 Zr-96 Zr 同位素对的比较器，以同时确定通量比。理论计算表明，对于热化良好 (Φth/Φe>100) 通道中用于分析的三分之二同位素，Zr 比较器-通量比监测器比 Ru 具有更好的精度和准确度。上述 Zr 同位素的 Io/σth 值已通过实验确定，并与之前发表的数据进行了比较。
Different methods for the determination of thermal-to-epithermal neutron flux ratio are reviewed and nuclear data for commonly used monitor materials and for Zr isotopes are tabulated. It is shown that the use of the94Zr−96Zr isotope pair gives significant improvement in precision while measuring Φth/Φe ratios in the 20<Φth/Φe<200 range. When the single comparator method is applied, the use of the94Zr isotope is suggested as a comparator with the94Zr−96Zr isotope pair for simultaneous flux ratio determination. Theoretical calculations show that the Zr comparator-flux ratio monitor gives better precision and accuracy than does Ru for two-thirds of the isotopes used for analysis in well thermalized (Φth/Φe>100) channels. The Io/σth-values for the mentioned Zr isotopes have been experimentally determined and compared with previously published data.