Author:
M. Kubota
M. Kubota
Japan Atomic Energy Research Institute Tokai-mura Ibaraki-ken Japan
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Abstract
In determining the trace impurities existing in high-purity rare earth samples by the neutron activation analysis, there are
much interference due to nuclides induced from neutron induced second order nuclear reaction. This paper presents the degree
of interference calculated over the ranges of irradiation time from 105 to 107 sec and of thermal-neutron flux from 1·1012 to 1·1015 n·cm−2·sec−1. According to the results of these calculations, degree of interference under the neutron irradiation condition for 288 hrs
in the thermal-neutron flux of 3·1013n·cm−2·sec−1 is concluded to be 6.4·106 ppm Gd in Eu, 2.2·104 ppm Sm in Eu, 1.9·104 ppm Ho in Dy, 1.1·103 ppm Eu in Sm, 1.1·102 ppm Ce in La and 1.1·10 ppm Tb in Gd, respectively. Especially, the Gd determination in the Eu target is extremely affected
by153Gd formed from the151Eu (n, γ)
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$${}^{1 5 1}Eu (n,\gamma ){}^{1 5 2}Eu\underrightarrow \beta {}^{1 5 2}Gd(n,\gamma ){}^{1 5 3}Gd$$
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reaction. On the contrary, this reaction is effective in producing153Gd activity.
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| Journal of Radionalytical and Nuclear Chemistry | |
|---|---|
| Language | English |
| Size | A4 |
| Year of Foundation |
1968 |
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