Precise measurement of cross sections for the⁹⁰Zr(n,2n)⁸⁹Zr reaction from threshold to 20 MeV

Abstract

The excitation function for the reaction 90Zr(n,2n)89Zr was measured from 12.3 to 19.5 MeV in steps of 0.2-0.8 MeV using activation techniques. The reaction T(d,n)4He was used to produce neutrons. Neutron fluences were determined by means of a proton-recoil telescope at 0 degrees and the differential neutron production cross sections. Additionally, in the energy range 13.4-14.8 MeV, measurements were performed in smaller energy steps (0.04-0.15 MeV) relative to well known cross sections for the reference reaction 27Al(n, alpha )24Na. Activity measurements were performed using a 12.7 cm*12.7 cm Nai(Tl) well-type detector.