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J Radiat Prot > Volume 12(2); 1987 > Article
Journal of Radiation Protection 1987;12(2):19-0.
$4{pi}{beta}-{gamma}$ 동시계수기술에 의한 $^{56}Mn$방사능 절대측정
황선태;최길웅;오필제;이경주;이건재;
Absolute $^{56}Mn$ Activity Measurement by $4{pi}{beta}-{gamma}$ Conincidence Counting Technique
Hwang, Sun-Tae;Choi, Kil-Oung;Oh, Pil-Jae;Lee, Kyung-Ju;Lee, Kun-Jai;
ABSTRACT
In order to determine the $^{56}Mn;{gamma}$-detection efficiency of a $MnSO_4$ bath system, it is essential to do the absolute activity measurement of $^{56}Mn$ solution. For the fabrication of $^{56}Mn$ samples, a 13.718 mg of $^{56}Mn$ metal flake with 99.99% purity was irradiated for 12 minutes at the thermal neutron field of about $10^{13}n/cm^2s$ of flux density. The neutron activated $^{56}Mn$ metal sample was dissolved in 50 ml of 0.1 N-HCl solution. The $^{56}Mn$ samples were fabricated by using the dissolved stock solution and the activity of each of them was measured by the $4{pi}{beta}-{gamma}$ coincidence counting technique. The obtained result was 408.070 kBq/mg with total uncertainty of 0.366% at reference date, 0 h on October 15, 1987.
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