Abstract

A method for the radiometric nondestructive determination of thorium in rare earths using multi-channel gamma-ray spectrometry is described. Radioactive secular equilibrium is discussed relative to the method. Results obtained are compared to other analytical techniques.

Determination of thorium and uranium in solution by laser-induced breakdown spectrometry

Arnab Sarkar, Devanathan Alamelu, and Suresh Kumar Aggarwal
Appl. Opt. 47(31) G58-G64 (2008)

Luminescence of Thorium Oxide Activated by Rare Earths. Optimum Concentration for Different Sources of Excitation

Frances G. Wick and Charlotte G. Throop
J. Opt. Soc. Am. 25(2) 57-62 (1935)

The Quantitative Spectrographic Analysis of the Rare Earth Elements*I. Determination of Samarium in NeodymiumII. Determination of Europium in Samarium

Velmer A. Fassel and Harley A. Wilhelm
J. Opt. Soc. Am. 38(6) 518-526 (1948)

Gamma Ray Spectroscopic Measurements of Mars

A. E. Metzger and J. R. Arnold
Appl. Opt. 9(6) 1289-1303 (1970)

The Quantitative Spectrographic Analysis of the Rare Earth Elements* III. Determination of Major Constituents in Complex Mixtures

Velmer A. Fassel
J. Opt. Soc. Am. 39(2) 187-193 (1949)