Intense SrF radical beam for molecular cooling experiments

Ming-Feng Tu; Jia-Jung Ho; Chih-Chiang Hsieh; Ying-Cheng Chen
November 2009
Review of Scientific Instruments;Nov2009, Vol. 80 Issue 11, p113111
Academic Journal
We have developed a continuous SrF radical beam for the loading of helium buffer gas cooling. The SrF molecules are efficiently generated by high-temperature chemical reaction of the solid precursor SrF2 with boron in a graphite oven. The beam properties are characterized with laser-induced fluorescence spectroscopic method. We obtain a molecular flux of up to 2.1×1015 sr-1 s-1 at the detection region for all rotational states. The dependence of the flux on oven temperature suggests that even higher flux is possible if a higher temperature in the oven is achieved.


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