Transport of Terrestrial gamma-Radiation in Plane Semi-Infinite Geometry

Peter Kirkegaard, Leif Løvborg

    Research output: Contribution to journalJournal articleResearchpeer-review


    The plane one-dimensional photon transport equation is solved for the scattered γ-radiation flux in the case of two adjacent media. One medium represents a natural ground with uniformly distributed potassium, uranium, and thorium γ-ray emitters. The other medium is air with no radioactive contaminants. The solution method is the double-P1 approximation with equidistant lethargy mesh. By this approach, which is discussed in some detail, it is possible to calculate the complete terrestrial γ-radiation field in an economical way. Calculated ground-level γ-ray exposure rates for igneous rocks with effective atomic numbers in the range 13.1 to 15.5 are presented.
    Original languageEnglish
    JournalJournal of Computational Physics
    Issue number1
    Pages (from-to)20-34
    Publication statusPublished - 1980


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