The fast neutron spectrum unfolding from measured proton recoil spectrum

This paper presents the method of fast neutron spectrum unfolding from measured pulse-height data produced by recoil protons in a scintillation detector. Computer code PULNE which is described use the algorithm with approximate corrections for effects of second scattering of neutrons by hydrogen and the loss of recoil protons through the detector surface. In that way the most important physical effect influenced the final results are taken in consideration, and the computer code is made to be easily adapted for use on a small computer. Results of analysis of pulse height data from measuring the spectrum of americium-berylium source are presented. (author)