History of the K/Ar-Method of Geochronology

  • F. G. Houtermans

Abstract

The history of the K/Ar-method for absolute dating of minerals and rocks is full of surprises and good guesses. The β-activity of potassium was discovered, together with that of rubidium, by J. J. Thomson as early as 1905. It was confirmed by a considerable number of authors (for the early literature of potassium β-activity cf. Meyer and Schweidler (1927)). The γ-activity of potassium was discovered by Kohlhörster in 1928 and studied by him in potassium-bearing salt mines. In 1935, Klemperer and, independently, Newman and Walke (1935), ascribed, from reasons of isotope systematics, the activity of potassium to a-then unknown — rare isotope K40. This was the first good guess. In 1935, A. O. Nier actually discovered this isotope and found its abundance to be 1.19 · 10-4 of the total K. Smythe and Hemmendinger (1937) found that the β--activity of K is actually due to K40.

Keywords

Argon Uranium Half Life Auger Kelly 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin · Heidelberg 1966

Authors and Affiliations

  • F. G. Houtermans

There are no affiliations available

Personalised recommendations