  The total nuclear cross-section Qtot(E) resulting from the interaction of
protons with nuclei is decomposed in 3 different contributions: 1. elastic
scatter at the complete nucleus, which adopts a part of the proton kinetic
energy; 2. inelastic scatter at a nucleus, which changes its quantum numbers by
vibrations, rotations, transition to highly excited states; 3. proper nuclear
reactions with change of the mass and/or charge number. Then different
particles leave the hit nucleus (neutrons, protons, etc.), which is now
referred to as 'heavy recoil' nucleus. The scatter parts of Qtot(E) according
to points 1 and 2 can be removed by a deconvolution acting at Qtot(E) in the
energy space. The typical nuclear reaction channels are mainly characterized by
resonances of a reduced cross-section function Qred(E). The procedure is
applied to cross-sections of therapeutic protons and also to Cs55137 as an
example with technical relevance (transmutations with the goal to drastically
reduce its half-time).
