Measurement of neutron activation cross sections for energies up to 40mev for natural samples of Mg, Si, Ca, V, Cr, Cu and Zn

Abstract

The cross section measurements of 17 neutron induced reactions using an intense sem: monoenergetic neutron field were recently reported. Neutrons for energies up to 40MeV wer produced by a simple Be target system bombarded by protons of 9 different energies betwee 20 and 40 MeV. Successively in this neutron field, we measured the cross sections of 15 reactions c natMg(n, Xnp)24Na, natSi(n, Xn2p)27Mg, natSi(n, Xnp)28Al, natSi(n, Xnp)29Al, natCa(n, Xnp)42K natCa(n, Xnp)48K, natV(n, Xn2p)46Sc, natV(n, Xn2p)47Sc, natCr(n, Xnp)52V, natCr(n, Xnp)53v natCu(n, Xn2p)62mCo (T1/2=14 min), natZn(n, Xn2p)65ni, natZn(n, Xnp)64Cu, natZ(n, Xnp)66Cu, and natZn(n, Xnp)68mCu (T1/2=3.8 min) by irradiating natural samples of Mg, Si, Ca, V, Ci Cu and Zn. The excitation functions of these reactions were obtained by using the least squares fitting (LSF) of the cross-section values calculated with the AL1CE/LIVERMORE8 code, and also by using the SAND-II and the NEUPAC unfolding codes with the initial gues values derived from the LSF results and empirical reference data. © 1994 Taylor & Francis Ltd.