Characterization of irradiation sites at DHRUVA and APSARA reactors for K_0-based NAA and determination of trace elements In some biological materials

R. Acharya; A.G.C. Nair; K.C. Jagadeesan

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Characterization of irradiation sites at DHRUVA and APSARA reactors for K_0-based NAA and determination of trace elements In some biological materials

机译：基于K_0的NAA在DHRUVA和APSARA反应器中的辐照部位的表征以及某些生物材料中微量元素的测定

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In order to apply K_0-based NAA at DHRUVA reactor, neutron spectrum has been characterized for five tray rod positions (1A, 2A, 4A, 16B and 25A). Values of epi-thermal neutron flux shape factor (a) and sub-cadmium to epi-thermal neutron flux ratio (f) have been determined by cadmium ratio method using Au and 94Zr monitors. The a value for the Al position was +ve whereas for other four positions the values were -ve. The f-values show that all the positions are highly thermalized with about 99 percent thermal neutron component. The IAEA CRM Soil-7 was analyzed using gold as the single comparator to evaluate accuracy of the method and percent deviations for most of the elements were found to be within + - 10 perent.

机译：为了将基于K_0的NAA应用于DHRUVA反应堆，已对五个托盘棒位置（1A，2A，4A，16B和25A）表征了中子光谱。超热中子通量形状因子（a）和次镉与超热中子通量之比（f）的值已通过使用Au和94Zr监测器的镉比方法确定。 Al位置的a值为+ ve，而其他四个位置的a为-ve。 f值表明，所有位置都被约99％的热中子成分高度热化。使用金作为单个比较器对IAEA CRM Soil-7进行了分析，以评估该方法的准确性，发现大多数元素的百分比偏差在±10％以内。

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《BARC Report》 |2005年第1期|共1页
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R. Acharya; A.G.C. Nair; K.C. Jagadeesan;
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Characterization of irradiation sites at DHRUVA and APSARA reactors for K_0-based NAA and determination of trace elements In some biological materials

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