Critical comparison of soft x-ray fluorescence detectors for XAFS studies in the 2 to 4 keV region

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5480447

Fischer, D A; Yang, C Y ^[1]

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1. Brookhaven National Lab., Upton, NY (USA)

We report a performance comparison of fluorescence detectors for XAFS in the soft x-ray region. In particular this comparison was made under the practical constraints of an existing hard x-ray beamline (X-19A NSLS) double Si(111) crystal monochromator with a 10 mil beryllium exit window. A critical comparison of an energy dispersive proportional counter and an ionization chamber was performed above the sulfur K edge for a very dilute sample and a mixed element system. Third harmonic contributions and signal to background are discussed with the conclusion that an energy dispersive proportional counter provides superior results under our beamline constraints. 7 refs., 4 figs.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5480447
• Report Number(s): BNL-43316; CONF-890802--3; ON: DE90001559
• Country of Publication: United States
• Language: English

Related Subjects

440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
645202 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BREMSSTRAHLUNG
COMPARATIVE EVALUATIONS
CYCLIC ACCELERATORS
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
MONOCHROMATORS
NSLS
RADIATION SOURCES
RADIATIONS
SOFT X RADIATION
SYNCHROTRON RADIATION
SYNCHROTRON RADIATION SOURCES
SYNCHROTRONS
X RADIATION
X-RAY FLUORESCENCE ANALYZERS