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Resolution enhancement of x-ray photoelectron spectra by maximum entropy deconvolution

✍ Scribed by Splinter, S. J.; McIntyre, N. S.

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 389 KB
Volume: 26
Category: Article
ISSN: 0142-2421
DOI: 10.1002/(sici)1096-9918(199803)26:3<195::aid-sia364>3.0.co;2-#

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✦ Synopsis

The maximum entropy method (MEM) is applied to the deconvolution of x-ray photoelectron spectra. This method provides the least-biased estimate of the unbroadened spectrum by using the Shannon information content as the regularizing functional. The large-scale, non-linear optimization problem is solved using a robust variable metric sequential-quadratic programming (SQP) algorithm implemented on a personal computer (PC). The program is tested on simulated spectra and then shown to provide reliable resolution enhancement of measured spectra by unfolding a measured instrumental resolution function. Typical resolution enhancements of 50% are achievable in AE15 min of computer time.

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