Measurement of quasi-elastic C(p,2p) scattering at high momentum transfer

Quasi-elastic scattering of electrons at large momentum transfer

Precision measurements of the energy of keV electrons scattered ‘elastically’ over large angles from solid films or gas-phase molecules show that these electrons have lost some energy. In particular scattering from a system that contains hydrogen and carbon reveals two well-separated elastic peaks. The amount of energy lost in the deflection of the electron depends not only on the mass of the n...

Elastic electron scattering from methane at high momentum transfer

We describe elastic electron scattering data at high momentum transfer (between ≈20 and ≈40 au) from methane and Xe. Under these conditions there is a significant recoil energy transferred to the target and electrons scattered elastically from methane are separated into two peaks: one due to electrons scattered from carbon, and one due to electrons scattered from hydrogen. The separation of the...

Elastic electron scattering from hydrogen molecules at high-momentum transfer

In high-momentum transfer electron scattering experiments the ‘elastic signal’ is separated into different components, depending on the mass of the scatterer due to the recoil effect. Here, we compare the peak positions and shapes obtained from H2, D2 and HD with theory developed for neutron scattering experiments at similar momentum transfer. The hydrogen peak width increases with increasing m...

Elastic electron scattering cross sections at high momentum transfer

The elastic scattering cross section of keV electrons over large angles (>90 ) is discussed. A comparison is made of the Rutherford cross section, the cross section obtained in the first Born approximation and that obtained by a partial wave calculation. The last approach differs significantly from the first two. For compounds, the recoil energy makes it possible to distinguish experimentally f...

Measurement of elastic electron scattering from the proton at high momentum transfer.