IMPROVEMENT ON INTRANUCLEAR CASCADE MODEL CALCULATION FOR AN ENERGY RANGE 500-1000MeV
Department of Nuclear Engineering, Kyushu University
Hakozaki, Higashi-ku, Fukuoka-shi 812, Japan
Yasuaki Nakahara and Takahiko Nishida
Japan Atomic Energy Research Institute
Tokai-mura, Ibaraki-ken 319-11, Japan
High energy proton beams of about 1GeV may be used for such engineering purposes as incineration of nuclear waste. Computer codes like High Energy Transport Code (HETC) are utilized for designing target systems. These codes treat high energy reactions on the basis of the intranuclear-cascade-evaporation model. They produce a discrepancy in experimental results in both neutron spectra and mass yields of residual nuclei. Improvement is made on the HETC to eliminate this disagreement. The intranuclear-cascade (INC) calculation is parametrically treated in this study. The preequilibrium calculation is introduced between the processes of INC and evaporation. A better agreement is obtained between the experimental and calculated results for both neutron spectra and residual mass yields.
KEYWORDS: proton, intranuclear, cascade, evaporation, spallation, HETC, neutron