  A new physics-based compact model, which makes it possible to simulate in a
unified way the neutron and proton of cosmic ray induced SEU cross sections,
including effects from nuclear reaction products and from direct ionization by
low-energy protons, has been proposed and vali-dated. The proposed approach is
analytical and based on explicit analytical relationships and approximations
with physics-based fitting parameters. GEANT4 or SRIM numerical calculations
can be used as an aid to adjust or refine the phenomenological parameters or
functions included in the model taking into account real geometrical
configurations and chemical compositions of the devices. In particular,
explicit energy dependencies of the soft error cross sections for protons and
neutrons over a wide range of nucleon energies were obtained and validated.
Main application areas of developed model include space physics, accelerator
studies high energy physics and nuclear experiments.
