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Title: Project Title: Radiochemical Analysis by High Sensitivity Dual-Optic Micro X-ray Fluorescence

A novel dual-optic micro X-ray fluorescence instrument will be developed to do radiochemical analysis of high-level radioactive wastes at DOE sites such as Savannah River Site and Hanford. This concept incorporates new X-ray optical elements such as monolithic polycapillaries, which focus X-rays. The polycapillary optic can be used to focus X-rays emitted by the X-ray tube thereby increasing the X-ray flux on the sample over 1000 times. The polycapillary optic will also be used to collect the X-rays from the excitation site. This will effectively screen the radiation background from the radioactive species in the specimen. This dual-optic approach significantly reduces the background and increases the analyte signal thereby increasing the sensitivity of the analysis. This dual-capillary design is essentially a confocal (having the same foci) design, i.e. the detected X-rays are only emitted from the overlap of the two focal spots. This increases spatial resolution and reduce s background. The integration of the X-ray optics increases the signal-to-noise and thereby increases the sensitivity of the analysis for low-level analytes. This work will address a key need for radiochemical analysis of high-level waste using a non-destructive, multi-element, and rapid method in a radiation environment. There is significant potential that thismore » instrumentation could be capable of on-line analysis for process waste stream characterization at DOE sites.« less
Authors:
;
Publication Date:
OSTI Identifier:
835002
Report Number(s):
EMSP-81967-2003
R&D Project: EMSP 81967; TRN: US0407417
DOE Contract Number:
FG07-01ER63280
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Jun 2003
Research Org:
Los Alamos National Laboratory, Los Alamos, NM; X-Ray Optical Systems, East Greenbush, Ny (US)
Sponsoring Org:
USDOE Office of Science (SC) (US)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DESIGN; EXCITATION; FLUORESCENCE; HIGH-LEVEL RADIOACTIVE WASTES; OPTICS; RADIATIONS; RADIOCHEMICAL ANALYSIS; SAVANNAH RIVER PLANT; SCREENS; SENSITIVITY; SPATIAL RESOLUTION; WASTES; X-RAY TUBES