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The Measurement of National Standard ${\beta}$-Rays Energy Spectrum  

Kim, Chul-Hang (Center for Ionizing Radiation, Korea Research Institute of Standards and Science)
Yi, Chul-Young (Center for Ionizing Radiation, Korea Research Institute of Standards and Science)
Kim, Hyun-Moon (Center for Ionizing Radiation, Korea Research Institute of Standards and Science)
Hah, Suck-Ho (Center for Ionizing Radiation, Korea Research Institute of Standards and Science)
Jeon, Gook-Jin (Center for Ionizing Radiation, Korea Research Institute of Standards and Science)
Publication Information
Progress in Medical Physics / v.23, no.4, 2012 , pp. 285-291 More about this Journal
Abstract
In the present study, we measured the pure beta particle energy spectra of $^{147}Pm$, $^{85}Kr$, $^{90}Sr+^{90}Y$ radionuclide sources. We confirmed the residual maximum energies of KRISS sources meet the requirement of ISO 6980 and calculated mass collision stopping power ratio, which is essential for absolute measurement of absorbed dose from the reference ${\beta}$-rays. The residual maximum energies of KRISS $^{147}Pm$, $^{85}Kr$, $^{90}Sr+^{90}Y$ sources are 0.14, 0.57 and 0.93 MeV, respectively and the mass collision stopping power ratios are 1.123, 1.120 and 1.109, respectively.
Keywords
Beta-rays; Energy spectrum; The residual maximum energy; Mass collision stopping power ratio;
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