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Marcus is probably right on this. It was 3 MeV alphas on C wasn't it? See: http://www.tunl.duke.edu/nucldata/figures/16figs/16_08_1993.pdf Bob On Jan 8, 2011, at 5:26 PM, Marcus Mendenhall wrote: > > *** Discussion title: Physics List > > I was originally thinking about suggesting TestEm7, too, but realized > that the request is a bit more complex. > > Few-MeV alphas on carbon, scattering at back angles, involve strong > mixing of the hadronic and electromagnetic component. I think nuclear > structure plays a strong part here, and so if high-accuracy is needed, > it may not be easy to get without detailed nuclear scattering cross > section information. > > It really depends on what is needed from the calculation. > > Marcus > > ------------------------------------------------------------- > Visit this GEANT4 at hypernews.slac.stanford.edu message (to reply or unsubscribe) at: > http://hypernews.slac.stanford.edu/HyperNews/geant4/get/phys-list/602/1/1.html