Proton Microanalysis

Abstract

A NUMBER of papers have been published^1–5 which demonstrate the use of nuclear reactions induced by charged particles as a tool for the measurement of light element concentrations. This “nuclear analysis” technique differs from conventional activation analysis in that suitable detectors are used to measure promptly the products (particles or radiation) of the reaction rather than the decay products present after the completion of the irradiation. Despite its many advantages, the technique has not become widely known or used. We show here that it is particularly suitable for application to the microanalysis of light elements in a manner which complements the electron probe microanalyser. The use of a small diameter proton beam (for example, 0.010 in. or less) to induce nuclear reactions permits non-destructive measurements to be made, particularly for light elements, which are often difficult to detect by other methods.