Phase Locking between Different Partial Waves in Atom-Ion Spin-Exchange Collisions

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...

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...

Ion-Atom Cold Collisions and Atomic Clocks

Spin-Exchange in Hydrogen-Antihydrogen Collisions

We consider the spin-exchange in ultracold collisions of hydrogen (H) and antihydrogen (H̄) atoms. The cross sections for transitions between various hyperfine states are calculated. We show that the process of spin exchange in H̄ − H collisions is basically driven by the strong force between proton and antiproton, that spin-exchange cross-sections are proportional to the difference of singlet an...