... smaller particles tend to represent man-made materials; the larger ones are of natural origin. The smaller particles exhibit fewer particle-size effects, and x-ray spectrometric determinations of ... 1974 X-Ray Spectrometry Donald E. Leyden, Department of Chemistry, Colorado State University Energy-Dispersive X-Ray Spectrometers Use of a goniometer in wavelength-dispersive x-ray spectrometers ... Instr. Meth., Vol 137 , 1976, p 473 5. F. Folkmann, J. Phys. E., Vol 8, 1975, p 429 6. T.A. Cahill, Ann. Rev. Nucl. Part. Sci., Vol 30, 1980, p 211 Particle-Induced X-Ray Emission Thomas...