ACTIVATION CROSS SECTION MEASUREMENTS BY 15-35 MeV QUASI-MONOENERGETIC p-Be NEUTRONS
Cyclotron and Radioisotope Center, Tohoku University
Aoba, Aramaki, Sendai 980, Japan
Institute for Nuclear Study, University of Tokyo
Midori-cho 3-2-1, Tanashi, Tokyo 188, Japan
A quasi-monoenergetic neutron field of energies from 15 MeV to 35 MeV has been developed by using the Be (p,n) reaction, for obtaining the data on activation cross sections at energies above 20 MeV which are presently very poor. This quasi-monoenergetic neutron field was utilized to measure the activation cross sections for materials of C, Na, Mg, Al, Si, Ca, Ti, V, Cr, Mn, Co, Cu, Zn, Zr, Nb, Mo and Au. The average cross sections were obtained from the measured activities and the excitation functions were estimated by unfolding technique.
KEYWORDS: neutron activation, average cross section, Be (p,n) reaction, excitation function, quasi-mono-energetic neutron, unfolding