• Change text size
• Skip to content

Supervising Scientist Division

Search:

• About us
• Contact us

• Home
  • Atmosphere
  • Biodiversity
  • Coasts and marine
  • Heritage
  • Human settlements
  • Land
  • Living sustainably
  • Parks and reserves
  • Water
  • EPBC Act

• Supervising Scientist
  • About us
    • Alligator Rivers Region
    • Legislation
    • Structure of SSD
    • Services
    • Working at SSD
  • Environmental monitoring
    • Ranger - Magela chemical data
    • Ranger - Gulungul chemical data
    • Jabiluka - Ngarradj (Swift Creek) chemical data
    • Ranger - Magela biological data
    • Radon monitoring stations
    • Surface Water Chemistry Monitoring
    • Sampling maps
  • Environmental research
  • Supervision and assessment
    • Working with the Northern Territory Government
    • Environmental incidents
    • Uranium mining in the ARR
  • Keeping the community informed
    • Committees and associations
    • Consultation with indigenous communities
    • Displays
  • Publications

Download

• Atmospheric concentrations of radon and radon daughters in Jabiru East (PDF 473 KB)

About the report

The results of atmospheric concentration measurements of radon and PAEC (total and unattached) for a one year cycle in Jabiru East in the northern tropical region of Australia are reported. The average annual radon and PAEC total concentrations are 39 ± 5 Bqm^-3 and 3.5 ± 0.5 mWL respectively. The high unattached radon daughter fraction, annual average of 0.21 ± 0.03, is attributed to the low concentration of condensation nuclei, about (1.3 ± 0.3) × 103 # cm^-3. Seasonal and diurnal variations are evident in these parameters. The unattached fraction is lower than average during the Dry season and also in the early morning when peaks occur in the radon and radon daughter concentrations. The condensation nuclei concentration and the equilibrium factor are higher than average during the dry months of the year.