Progress in Medical Physics (한국의학물리학회지:의학물리)

Korean Society of Medical Physics (한국의학물리학회)
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The Measurement of National Standard ${\beta}$-Rays Energy Spectrum

기준 베타선장의 에너지 스펙트럼 측정

  • 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)
  • 김철항 (한국표준과학연구원 방사선표준센터) ;
  • 이철영 (한국표준과학연구원 방사선표준센터) ;
  • 김현문 (한국표준과학연구원 방사선표준센터) ;
  • 하석호 (한국표준과학연구원 방사선표준센터) ;
  • 전국진 (한국표준과학연구원 방사선표준센터)
  • Received : 2012.11.02
  • Accepted : 2012.12.10
  • Published : 2012.12.31
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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.

Si(Li) 검출기를 이용해 한국표준과학연구원에서 보유한 베타선 선원인 $^{147}Pm$, $^{85}Kr$, $^{90}Sr+^{90}Y$ 선원의 순수 베타선 에너지 스펙트럼을 측정하였고 이 측정 스펙트럼에 대한 잔여에너지와 질량충돌저지능비를 산출하였다. 베타선의 잔여에너지는 $^{147}Pm$, $^{85}Kr$, $^{90}Sr+^{90}Y$ 선원에 대하여 각각 0.14, 0.57, 0.93 MeV으로 평가되었고 질량충돌저지능비는 각각 1.123, 1.120, 1.109이었다.

Keywords

References

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