VARIABLE X-RAY EXCITATION FOR TOTAL REFLECTION X-RAY FLUORESCENCE SPECTROMETRY USING AN MO/W ALLOY ANODE AND A TUNABLE DOUBLE MULTILAYER MONOCHROMATOR

摘要

A new total reflection X-ray fluorescence spectrometer has been developed which uses a variable double multilayer arrangement as a tunable monochromator together with an X-ray fine structure tube which is characterized by an anode made of a homogeneous alloy of molybdenum and tungsten. Three discretely adjustable excitation energies, namely 9.7 keV, 17.5 keV and 35 keV, are supplied by this combination. The detection limits were determined to be 0.4 pg nickel using W L beta excitation, 0.6 pg lead using Mo K alpha excitation and 8 pg cadmium using 35 keV bandpass excitation. (C) 1997 Elsevier Science B.V. [References: 3]