Method and apparatus for implement XANES analysis
First Claim
1. A system for performing x-ray absorption near-edge structure analysis, the system comprising:
- a focusing, doubly-curved x-ray optic for directing x-rays having a first energy onto a sample;
a detector for detecting x-rays having a second energy emitted by the sample when the sample is exposed to x-rays;
means for varying the first energy of the x-rays directed onto the sample wherein the second energy of the x-rays emitted by the sample varies responsive thereto; and
means for analyzing the variation in the second energy of the detected x-rays to provide information concerning near-edge structure of an x-ray absorption spectrum of the sample.
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Accused Products
Abstract
Compact, low-power-consuming systems and methods for exposing samples to high-energy radiation, for example, for exposing samples to x-rays for implementing x-ray absorption near edge analysis (XANES). The systems and methods include a low-power-consuming radiation source, such as an x-ray tube; one or more tunable crystal optics for directing and varying the energy of the radiation onto a sample under analysis; and a radiation detecting device, such as an x-ray detector, for detecting radiation emitted by the sample. The one or more tunable crystal optics may be doubly-curved crystal optics. The components of the system may be arranged in a collinear fashion. The disclosed systems and methods are particularly applicable to XANES analysis, for example, XANES analysis of the chemical state of chromium or another transition metal in biological processes.
26 Citations
31 Claims
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1. A system for performing x-ray absorption near-edge structure analysis, the system comprising:
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a focusing, doubly-curved x-ray optic for directing x-rays having a first energy onto a sample; a detector for detecting x-rays having a second energy emitted by the sample when the sample is exposed to x-rays; means for varying the first energy of the x-rays directed onto the sample wherein the second energy of the x-rays emitted by the sample varies responsive thereto; and
means for analyzing the variation in the second energy of the detected x-rays to provide information concerning near-edge structure of an x-ray absorption spectrum of the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of practicing x-ray absorption near-edge structure analysis, the method comprising:
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directing x-rays having a first energy onto a sample using a focusing, doubly-curved x-ray optic; detecting x-rays having a second energy emitted by the sample when the sample is exposed to x-rays; varying the first energy of the x-rays directed onto the sample wherein the second energy of the x-rays emitted by the sample varies responsive thereto; and analyzing the variation in the second energy of the detected x-rays to provide information concerning near-edge structure of an x-ray absorption spectrum of the sample. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification