Collision photography: polarization imaging of atom-molecule collisions.

Communications: When diffraction rules the stereodynamics of rotationally inelastic collisions.

Following upon our recent work on vector correlations in the Ar-NO collisions [Lemeshko and Friedrich, Phys. Chem. Chem. Phys. 12, 1038 (2010)], we compare model results with close-coupling calculations for a range of channels and collision energies for the He-NO system. The striking agreement between the model and exact polarization moments indicates that the stereodynamics of rotationally ine...

R-matrix calculations of polarisation effects in low-energy positron-molecule collisions

The study of the interaction of positrons with atoms and molecules has become increasingly popular, because more and more experimental activities have become feasible. Although exchange effects are absent, the polarisation effects, caused by the attractive nature between the positron and the target electrons, make the positron-molecule collisions more difficult to handle than the corresponding ...

ar X iv : p hy si cs / 0 50 91 97 v 1 2 3 Se p 20 05 Atom - molecule collisions in an optically trapped gas

Cold inelastic collisions between confined cesium (Cs) atoms and Cs2 molecules are investigated inside a CO2 laser dipole trap. Inelastic atom-molecule collisions can be observed and measured with a rate coefficient of ∼ 2.5× 10 cm s, mainly independent of the molecular ro-vibrational state populated. Lifetimes of purely atomic and molecular samples are essentially limited by rest gas collision...

Measurement of the linear polarization of the high energy end of electron-nucleus bremsstrahlung

Bremsstrahlung is one of the basic photon-matter processes occurring in collisions of electrons with atoms and ions. Bremsstrahlung in electron-atom collisions has been the object of extensive experimental and theoretical studies [1]. These studies focused on the angular dependence of the intensity distribution of the bremsstrahlung, as well as on its linear polarization [2]. Another production...

Electronic and Vibrational Excitation in Atom/ Molecule Collisions