Orsay: simulate elastic scattering and reaction for 80 MeV

These are the things we're most likely to see from the 80 MeV natC run: elastic scattering (both particles) from the target ¹²C and the ¹⁶O contamination; and reaction products (¹⁸O and α). The simulations were done for all angles, without reference to the detector locations or energy ranges; those are indicated by the dotted black lines.
In detector 1, all of the elastic scattering products will be practically indistinguishable, with the ¹⁸O at a somewhat lower energy. In the quad, the forward detectors (4 and 5) may see two elastic scattering loci (or even three--the angular range for the 16O scattering is probably larger than I've shown) and some alphas, while the backward detectors (2 and 3) will see more alphas but no elastic scattering at all.