Optimization of a multi-line neutron source based on a 232Th filter

[+] Author and Article Information
Yuval Ben Galim

NRC-Negev, P.O. Box 9001, Beer-Sheva 84190, Israel

Raymond Moreh

Physics Department, Ben Gurion University of the Negev, Beer-Sheva 84105, Israel

Itzhak Orion

Department of Nuclear Engineering, Ben Gurion University of the Negev, Beer-Sheva 84105, Israel

1Corresponding author.

ASME doi:10.1115/1.4036435 History: Received October 22, 2016; Revised April 01, 2017


A multiline neutron source can be produced by using a metallic 232Th filter in conjunction with a white neutron source. The multiline spectrum consists of ~ 20 relatively strong intensity lines ranging from 10 to 4000 eV. It is shown that the width of each neutron line of the spectrum is strongly dependent on the absorber thickness. This neutron source is useful for accurate cross section measurements with precise neutron energies. The optimum thickness of the 232Th absorber which was found to yield a sharp multiline spectrum throughout the above energy range was found to be ~ 14 cm.

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