하나로를 이용한 중성자 이중 포획반응에 의한 166Ho 생성량 평가
The Evaluation of 166Ho Product by Double Neutron Capture from HANARO Research Reactor
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In this paper, production of 166Ho by double neutron capture from HANARO researchreactor was evaluated. This production approach provides 166Ho with high specific activity. 164Dyis transmuted into 165g+mDy by (n,γ) reaction, then 165g+mDy is transmuted into 166Dy by (n,γ)reaction. At the end of neutron irradiation, population of 166Dy atoms reaches highest point. And164Dy exists as a mixture with 165mDy, 165Dy, 166Ho and 165Ho at this point. To obtain 166Ho with highspecific activity, Ho isotopes from irradiated target is separated out. Then 166Ho decayed from166Dy is eluted at radioactive equilibrium state. At each step, the number of relevant nuclide iscalculated by the state equation. The neutron irradiation time for maximum 166Dy is calculated for283 hour. When 100 mg target of Dy2O3 (96.8% enriched 164Dy) is used, possible activity of 166Ho is3.54 Ci (1.31×1011 Bq). For separation efficiency of Dy/Ho is 99.99%, 166Ho/Ho is 0.62.
Abstract
In this paper, production of 166Ho by double neutron capture from HANARO researchreactor was evaluated. This production approach provides 166Ho with high specific activity. 164Dyis transmuted into 165g+mDy by (n,γ) reaction, then 165g+mDy is transmuted into 166Dy by (n,γ)reaction. At the end of neutron irradiation, population of 166Dy atoms reaches highest point. And164Dy exists as a mixture with 165mDy, 165Dy, 166Ho and 165Ho at this point. To obtain 166Ho with highspecific activity, Ho isotopes from irradiated target is separated out. Then 166Ho decayed from166Dy is eluted at radioactive equilibrium state. At each step, the number of relevant nuclide iscalculated by the state equation. The neutron irradiation time for maximum 166Dy is calculated for283 hour. When 100 mg target of Dy2O3 (96.8% enriched 164Dy) is used, possible activity of 166Ho is3.54 Ci (1.31×1011 Bq). For separation efficiency of Dy/Ho is 99.99%, 166Ho/Ho is 0.62.
참고문헌 (13)
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