Measurement of Radon and its Daughters Concentration in Air

공기중 라돈 및 라돈 자핵종의 농도 측정

  • Park, Y.W. (Korea Advanced Energy Research Institute) ;
  • Ha, C.W. (Korea Advanced Energy Research Institute) ;
  • Ro, S.G. (Korea Advanced Energy Research Institute)
  • Published : 1989.12.20

Abstract

A Lucas cell was established and calibrated by using the double layer tube standard radon source. The calibration factors were 0.031$\pm$0.002 (pCi/l)/(cph/Cell) at room temperature, and 0.029$\pm$0.001 (pCi/l)/(cph/Cell) at $50^{\circ}C$. Radon and its daughters concentrations were measured in a room air for the demonstrating purpose. The concentrations of 222 Rn, $^{218}Po,\;224\;Pb,\;and\;^{214}Bi$ were 0.87, 0.53, 0.35 and 0.26 pCi/l. The total eqilibrium factor was around 0.40 and the WL is $3.33{\times}10^{-3}$, resulting in 30 mrem/yr at this place.