Investigating the 3D Compton Profile and the role of electron-electron correlation in H2

We propose to explore Compton scattering in the simplest molecule (H2) in the gas phase in the molecular frame of reference. The experiment will yield the first 3-dimensional Compton profile of a molecular orbital (in the molecular frame of reference) for a gas-phase molecule. We will also investigate how the Compton profile of one electron is altered by excitation of the second electron in H2 via electron-electron correlation. In order to perform the experiment we will bring a COLTRIMS Reaction Microscope with a truck from Frankfurt and install it for one week at ID31. We had two beamtimes before the shutdown with our transportable specialised endstation, which yielded three publications in Phys. Rev. Lett. demonstrating the power of our multi-particle coincidence technique.