Spin dependent inelastic collisions between metastable state two-electron atoms and ground state alkali-atoms

Role of electronic excitations in ground-state-forbidden inelastic collisions between ultracold atoms and ions.

The role of electronic excitation in inelastic collisions between ultracold Ca atoms and Ba(+) ions, confined in a hybrid trap, is studied for the first time. Unlike previous investigations, this system is energetically precluded from undergoing inelastic collisions in its ground state, allowing a relatively simple experimental determination and interpretation of the influence of electronic exc...

Multichannel cold collisions between metastable Sr atoms.

We present a multichannel-scattering calculation of elastic and inelastic cold collisions between two low-field seeking, metastable 88Sr [(5s5p)3P2] atoms in the presence of an external magnetic field. The scattering physics is governed by strong anisotropic long-range interactions, which lead to pronounced coupling among the partial waves of relative motion. As a result, nonadiabatic transitio...

Spin-dependent collision of ultracold metastable atoms

Spin-polarizedmetastable atoms of ultracold ytterbium are trapped at high density and their inelastic collisional properties are measured. We reveal that in collisions of Yb(P2) with Yb(S0) there is relatively weak inelastic loss, but with a significant spin dependence consistent with Zeeman sublevel changes as being the dominant decay process. This is in strong contrast to our observations of ...

TIHE METASTABLE 2p3-STATE OF MfERCURY ATOMS

Thermalization of fast cesium 5D3/2 atoms in collisions with ground-state cesium atoms

We have investigated collisions involving fast, excited Cs atoms produced by photodissociating Cs2 molecules with a pulsed dye laser. The velocities of the atoms in the 5D state formed by the process Cs2sX Sg d+"vpump→Cs2→Css5Dd+Css6Sd are much greater than typical thermal velocities associated with the cell temperature. Using a narrow-band cw probe laser to observe the increased Doppler broade...