Formation of molecular ions by radiative association of cold trapped atoms and ions

摘要: Radiative emission during cold collisions between trapped laser-cooled Rb atoms and alkaline-earth ions (Ca$^+$, Sr$^+$, Ba$^+$) Yb$^+$, Li are studied theoretically, using accurate effective-core-potential based quantum chemistry calculations of potential energy curves transition dipole moments the related molecular ions. association is predicted to occur for all systems with a cross section two ten times larger than radiative charge transfer one. Partial total rate constants also calculated compared available experiments. Narrow shape resonances expected, which could be detectable at low temperature an experimental resolution limit present standards. Vibrational distributions calculated, showing that final not created in their ground state level.