FRS calculator:
degrader wedge angle
total nuclear absorption
fragmentation cross section
angular scattering
relative dE or dp
Coulomb energy
E center of mass
e-capture cross section
REC in e-cooler
binding energy K-shell
Psi??? from Z1, Z2, A1, E
polynomial
dE/dx from Bethe formula
energy-loss straggling from Bohr formula
Brho,p from E,m,q
E from Brho,m,q
E from beta
beta from E
m/q from E, Brho
Brho from E,m,q,