  A model in which a projectile like fragment can be simply regarded as a
remnant after removal of some part of the projectile leads to an excited
fragment. This excitation energy can be calculated with a Hamiltonian that
gives correct nuclear matter binding, compressibility and density distribution
in finite nuclei. In heavy ion collisions the model produces a dependence of
excitation energy on impact parameter which appears to be correct but the
magnitude of the excitation energy falls short. It is argued that dynamic
effects left out in the model will increase this magnitude. The model can be
directly extended to include dynamics but at the expense of increased
computation. For many calculations for observables, a temperature is an easier
tool to use rather than an excitation energy. Hence temperature dependences on
impact parameter in heavy ion collisions are displayed.
