Hannover 2003 – wissenschaftliches Programm
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A: Atomphysik
A 17: Postersitzung 2
A 17.28: Poster
Donnerstag, 27. März 2003, 16:00–18:30, Poster
Optically Trapped Atoms as a Target for Molecular Ion Beams — •Wenzel Salzmann, Roland Wester, and Matthias Wester — Max-Planck-Institut für Kernphysik, Postfach 103980, 69029 Heidelberg
We are setting up a new experiment in which we combine a magneto-optical trap for alkali atoms with Recoil Ion Momentum Spectroscopy (RIMS)[1]. The projectile ion beam will consist of diatomic molecular ions at keV energies (in particular H2+). The RIMS technique allows a kinematically complete collision experiment which gives precise information on both the energy and momentum exchange between projectile and target. By using optical manipulation techniques the target can be prepared in a well defined internal state. Additionally, due to optical cooling one can expect a limit in the momentum resolution to be of the order 10−2 a.u. With this setup we will investigate charge transfer collisions between the trapped atoms and molecular ions. This will open a new approach to map the electronic manifold of highly excited molecular Rydberg states. In a second step the molecular ions will be stored in a linear electrostatic trap[2] in order to achieve efficient relaxation of internal motion into the rovibrational ground state.
The poster will introduce the physics behind our experiment and show the current status of the setup.
[1] R.Dörner et al, Physical Reports 330(2000) 95 192
[2] D.Zajfman et al, Phys.Rev. A Vol 55,No.3,1577(1997)