On the accuracy of techniques for determining neutron compound-nucleus formation cross sections

Free access article

Issue		EPJ Web of Conferences Volume 2, 2010 CNR*09 - Second International Workshop on Compound Nuclear Reactions and Related Topics


Article Number		01001
Number of page(s)		4
Section		Optical Model Calculations
DOI		10.1051/epjconf/20100201001
Published online		09 March 2010

EPJ Web of Conferences 2, 01001 (2010)

On the accuracy of techniques for determining neutron compound-nucleus formation cross sections

F.S. Dietrich^a

Lawrence Livermore National Laboratory, L-414, P.O. Box 808, Livermore, CA 94551, USA

^a e-mail: fsdietrich@sbcglobal.net

Abstract

We consider three methods for determining neutron nonelastic cross sections: direct measurement by transmission of neutrons through a spherical shell; subtraction of the angle-integrated elastic cross section from the total cross section; and a modification of the subtraction technique using Wick’s limit that in favorable cases can significantly reduce the errors in the subtraction method. We show new results using the modified subtraction technique for nonelastic cross sections at 21.6 MeV neutron energy over a wide mass range, and discuss criteria that should be satisfied in order for the modified subtraction technique to be reliable.

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