Unfolding of Neutron and Photon Spectra
Principle of MAXIMUM ENTROPY and Theorem of BAYES,
The HEPROW and RESTRAW program packages
Manfred Matzke
D-38116 Braunschweig
UNFANA MIEKE
GRAVEL HEPRO
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Theory
For a detailed description of the theory concerning unfolding the reader should look at fundamental textbooks. Here only a short overview is given.
There is an article as a PDF-file included named Unfolding Methods with a short overview on the theory, mainly focussed on neutron physics.
This article is based on recent publications mentioned in the text. Parts of this PDF-file can also be found in Chapter 9 of the Handbook:

Neutron and Photon Spectrometry and Techniques for Radiation Protection
(Ed. by D. J. Thomas and H. Klein), published as
Radiation Protection Dosimetry Vol. 107, 1-3 (2003) ISBN 1 904453 01 5

A second important book is

NEUSPEC 2000: Proceedings of the International Workshop on Neutron Field Spectrometry in Science, Technology and Radiation Protection, Pisa, June 4-8, 2000,
published as: Nuclear Instruments & Methods in Physics Research A 476 (2002).

It is highly recommended to read the above mentioned PDF file Unfolding Methods before starting the unfolding work.
There is also a file included containing a number of transparencies which might be helpful in understanding what is going on. You may download the transparencies.
You may have a look at the publication list of the author with references concerning unfolding work.

  Stand: 12.12.2005