Thermal neutron activation analysis for potassium,holmium and lanthanum in tungsten bronzes

Methods for the analysis of potassium, holmium and lanthanum in their tungsten bronzes, M _x WO₃, are described. Simultaneous thermal neutron activation of samples and comparison standards was followed by counting with Ge(Li) diodes. Analysis was performed by comparing appropriate full energy peaks in the spectra of the three elements with peaks in the¹⁸⁷W spectrum for sample and standard. Results with accuracy of 1 to 3% were obtained. Work was performed in the Ames Laboratory of the U.S. Atomic Energy Commission. Contribution No. 2700.