Improving efficiency of sympathetic cooling in atom-ion and atom-atom confined collisions

Ion-Atom Cold Collisions and Atomic Clocks

Isotope effect in ion-atom collisions

We explain the origin of the unusual large isotopic dependence found in charge-transfer cross sections for H(D,T)+ + Be collisions. We show that this large effect appears in a semiclassical treatment as a consequence of the mass dependence of the charge-transfer transition probabilities, which is due to the variation of the radial velocity in the region where the nonadiabatic transitions take p...

Computer Simulations in Ion-Atom Collisions

Computer simulation has become increasingly important over the last 50 years for modelling and solving different ideas within science. One area in science that computer simulation and its applications is extensively used is Ion-Atom collisions. There are many different aspects to these collisions but this poster will concentrate on measuring the Triply Differential Cross Section (TDCS) for sing...

Spin controlled atom-ion inelastic collisions

The control of ultracold collisions between neutral atoms is an extensive and successful field of study. The tools developed in this field allow for ultracold chemical reactions to be managed using magnetic fields1, light fields2 and spin-state manipulation of the colliding particles3 among other methods. Control of chemical reactions in ultracold atom-ion collisions is a young and growing fiel...

Positronium-Atom Collisions

New results are presented for Ps(1s) scattering by H(1s), He(1S) and Li(2s). Calculations have been performed in a coupled state framework, usually employing pseudostates, and allowing for excitation of both the Ps and the atom. In the Ps(1s)H(1s) calculations the H− formation channel has also been included using a highly accurate H− wave function. Resonances resulting from unstable states in w...