Journal article

Elemental X-ray imaging using the Maia detector array: The benefits and challenges of large solid-angle

CG Ryan, R Kirkham, RM Hough, G Moorhead, DP Siddons, MD de Jonge, DJ Paterson, G De Geronimo, DL Howard, JS Cleverley

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | ELSEVIER SCIENCE BV | Published : 2010

Abstract

The fundamental parameter method for quantitative SXRF and PIXE analysis and imaging using the dynamic analysis method is extended to model the changing X-ray yields and detector sensitivity with angle across large detector arrays. The method is implemented in the GeoPIXE software and applied to cope with the large solid-angle of the new Maia 384 detector array and its 96 detector prototype developed by CSIRO and BNL for SXRF imaging applications at the Australian and NSLS synchrotrons. Peak-to-background is controlled by mitigating charge-sharing between detectors through careful optimization of a patterned molybdenum absorber mask. A geological application demonstrates the capability of th..

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