Düsseldorf 2007 – scientific programme

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MO: Fachverband Molekülphysik

MO 63: Spectroscopy in He-droplets / Ultracold Molecules I (gemeinsam mit Q)

MO 63.6: Talk

Friday, March 23, 2007, 12:00–12:15, 6B

Buffer-gas cooling of CrH and MgH in a cryogenic magnetic trap for paramagnetic molecules — •Michael Stoll¹, Tim Steimle², Gerard Meijer¹, and Achim Peters³ — ¹Fritz-Haber-Institut der Max-Planck-Gesellschaft — ²Department of Chemistry and Biochemistry, Arizona State University — ³Humboldt Universität zu Berlin, Institut für Physik

The buffer gas loading and subsequent magnetic trapping of neutral molecules is a powerful tool for it can provide samples of cold molecules with very high densities. We report on the buffer-gas cooling of CrH and MnH radicals to a temperature of below 1 K, using a dilution refrigerator. We also present data on the first attempts to trap CrH and discuss inelastic scattering with the Helium background gas as a possible loss mechanism preventing effective trapping.

Further experiments using CrD, MnH and MnD should give additional information on the exact role of inelastic scattering processes. First estimations indicate that trapping of MnH should in principle be feasible in our current setup, whereas trapping of CrH would require substantial modifications to our cryogenic system.