A sample cell and low-temperature accessory design for fluorescence-mode x-ray absorption spectroscopy of air-sensitive and corrosive compounds
- Department of Chemistry, The University of Chicago, Chicago, Illinois60637 (United States)
A sample cell and low-temperature cooling unit design suitable for x-ray absorption spectroscopy (XAS) of oxygen and/or water sensitive compounds is presented. The cell is a simplified and optimized modification of a previously suggested design. The low-temperature accessory is specifically designed for good thermal isolation and equilibration at liquid nitrogen temperatures, eliminating the need for a more expensive commercial cryostat. The entire construction can be directly attached to an ion chamber and either a standard Lytle detector or energy-discriminating germanium-element solid-state detector via helium gas-purged adaptor flanges. The apparatus was tested at liquid nitrogen temperatures and gave good temperature stability within {plus_minus}0.1 K. The XAS signal from an air-sensitive potassium/pyrene complex at 100 K taken at the X-6B beam line at the National Synchrotron Light Source facility at Brookhaven National Laboratory is presented. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 627946
- Journal Information:
- Review of Scientific Instruments, Vol. 69, Issue 5; Other Information: PBD: May 1998
- Country of Publication:
- United States
- Language:
- English
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