DIRECT RADIOMETRIC MEASUREMENT BY GAMMA-RAY SCINTILLATION SPECTROMETERPART II: URANIUM, THORIUM, AND POTASSIUM IN COMMON ROCKS

PATRICK M HURLEY

doi:10.1130/0016-7606(1956)67[405:DRMBGS]2.0.CO;2

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Research Article| April 01, 1956

DIRECT RADIOMETRIC MEASUREMENT BY GAMMA-RAY SCINTILLATION SPECTROMETER: PART II: URANIUM, THORIUM, AND POTASSIUM IN COMMON ROCKS

PATRICK M HURLEY

U. S. GEOLOGICAL SURVEY, WASHINGTON 25, D. C., AND MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE 39, MASS.

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Author and Article Information

PATRICK M HURLEY

U. S. GEOLOGICAL SURVEY, WASHINGTON 25, D. C., AND MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE 39, MASS.

Publisher: Geological Society of America

Received: 22 Sep 1955

First Online: 02 Mar 2017

Online ISSN: 1943-2674

Print ISSN: 0016-7606

GSA Bulletin (1956) 67 (4): 405–412.

https://doi.org/10.1130/0016-7606(1956)67[405:DRMBGS]2.0.CO;2

Abstract

The method described in Part I of this report has been extended to the measurement of the uranium and thorium series and potassium in common rocks, or materials of comparable activity, in which the series are in secular equilibrium. The counting rate in an additional band centered on the photopeak from the 1.46 Mev gamma ray of K⁴⁰ permits the measurement of potassium and the removal of the counts due to the potassium in the other channels.

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