UNF Code for Fast Neutron Reaction Data Calculations

摘要

Theoretical improvements have been made in the unified Hauser-Feshback and exction model. The angular momentum conservation is considered in reaction processes for both equilibrium and pre- Equilibrium mechanisms. The recoil effects in varied emission processes are teken into account strictly so The energy balance can be held exactly. A method for calculating double-differential cross sections of Composite particles is proposed. Based on this theoretical frame, the UNF code (2001 version) for calcu- Lating neutron-induced reaction data of structural materials below 20 MeV was issued. The functions of The UNF code are introduced.