INVESTIGADORES
SANCHEZ Hector Jorge
artículos
Título:
New Spectrometer for Grazing Exit X-Ray Fluorescence
Autor/es:
R.D. PÉREZ; H. J. SÁNCHEZ
Revista:
REVIEW OF SCIENTIFIC INSTRUMENTS
Editorial:
AMER INST PHYSICS
Referencias:
Lugar: New York; Año: 1997 vol. 68 p. 2861 - 2863
ISSN:
0034-6748
Resumen:
Among the x-ray fluorescence techniques using energy dispersive systems, the excitation in the total
reflection regime is becoming widespread. This technique may be applied to surface analysis if the
fluorescent radiation emitted by the sample is measured as a function of the grazing incidence angle.
The main limitation in performing this sort of analysis is the need to use a monochromator, which
notably reduces the incident flux of radiation. Besides, the method requires the radiated surface to
be perfectly smooth and polished and to have a total length of some centimeters. A similar technique
known as grazing exit x-ray fluorescence presents certain advantages and is easier to implement. By
this method, fluorescent photons in terms of the grazing exit angle are detected. In this work, a
spectrometer for performing surface analysis at grazing exit is described, the different experimental
situations are analyzed, and some measurements performed with this device are shown.