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Hannover 2010 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 2: Collisions, Energy Transfer

MO 2.7: Vortrag

Montag, 8. März 2010, 15:30–15:45, F 142

Scattering of state selected molecular beams — •Moritz Kirste, Ludwig Scharfenberg, Henrik Haak, Christian Schewe, Gerard Meijer, and Sebastiaan van de Meerakker — Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Deutschland

The crossed molecular beam technique is a mature and important experimental method to understand molecular interactions and molecular reaction dynamics. The Stark deceleration technique yields unprecedented control over both the internal and external degrees of freedom of polar molecules in a molecular beam. The combination of both techniques offers new possibilities in scattering experiments. In particular, crossed Stark-decelerated molecular beams allow detailed molecular scattering studies as a function of the collision energy, from low to high collision energies, and with a very high energy resolution. The success of any collision experiment critically depends on the number density, the state purity and the energy resolution i.e. the velocity distribution of the collision partners. We have developed a Stark decelerator that is operated using a unique decelerating scheme to provide a higher density of decelerated molecules, and we have developed a hexapole to focus and state select molecules. We will present our results on the scattering of beams of D2 and state selected OH(X2Π3/2,J=3/2), and our progress on the scattering of state selected beams of OH(X2Π3/2,J=3/2) and NO(X2Π1/2,J=1/2).

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