TY  - GEN
A1  - Hassan, Saba Zia
N2  - In this work, the dynamics of anion-neutral interactions are studied in a hybrid atom-ion trap. An octupole radio-frequency trap is used for trapping anions, and a dark spontaneous-force optical trap is employed to create ultracold rubidium (Rb) atoms. Spatial density distributions of the ion and atom clouds are determined via photodetachment tomography and saturation absorption imaging, respectively. A method to map the ions? translational temperature onto their time of flight to the detector is presented. This technique is applied to determine the temperature of OH?anions as they undergo laser-induced forced evaporative cooling to temperatures below 4 K. The dynamics of associative electronic detachment reaction between closed-shell anions OH?and alkali atoms are investigated where for a ground-state Rb the influence of a dipole-bound state as a reaction intermediate is observed. The interaction dynamics of Rb with OH?(H2O) are also explored, where a smaller atom-to-ion mass ratio favors sympathetic cooling via elastic collisions. For atomic O?, the detachment processes involving ground-state Rb are found to be closed and efficient anion sympathetic cooling, via ultracold Rb, is observed. These results present hybrid systems as a platform to investigate anion-neutral collision dynamics, particularly interesting for astrochemistry, fundamental physics, and quantum chemistry.
TI  - Dynamics of anions and ultracold atoms in a hybrid atom-ion trap.
AV  - public
Y1  - 2022///
ID  - heidok31692
CY  - Heidelberg
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/31692/
ER  -