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B Basic Data
Average Radloelement Content of Igneous Rocks
Average Radioelement Content of Sedimentary Rocks
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14 bags 40 bags absorption coefficient aeroradiometric air distances anomalies approximate area sources atomic attenuation average background bags l.n.s. bags p.c.p. calculated calibration Compton scattering concentrates Cont'd cosmic ray counting rate density detection detector effective infinite effective point sources equation evaluated exponential feet flight elevation flux gamma photons gamma radiation gamma ray geiger counter geological gneisses gradarea factor greater ground helicopter igneous rock increase length linear source lithologic signal measured mg Ra(6 natural sources obtained occur outcrop pegmatites photomultiplier pitchblende pitchblende vein Port Radium potassium probable error Probe Data probe voltage radiation intensity radiometric radium radon ratio scintillation counter secoc sensitivity Shielding signal modification significant signal Source Data source grade source intensity specific activity spot source surface survey Table 19 thorium thorium and potassium tt n tt tt tt tt U^Og uranium variable variation varies velocity modification voltage