title: Determination of copper in geological material by neutron activation and gamma-gamma coincidence spectrometry.
abstract: The copper content of some geological samples has been determined by thermal neutron activation and subsequent coincidence gamma-spectrometry, taking advantage of the 180 degrees annihilation quanta of (64)Cu. By this means the interference of (24)Na, which is often the major gamma-activity induced in geological materials, is greatly reduced. The method is precise to about +/- 5 %, and the error is of the same order. The method should be especially attractive for application to samples with a copper content of 100-1000 ppm.
authors.affiliation: Institutt for Atomenergi KjellerNorway.
authors.forename: O B
authors.initials: OB
authors.lastname: Michelsen
authors.forename: E
authors.initials: E
authors.lastname: Steinnes