dc.creator Tsuji, Hidenobu en_US dc.creator Taji, Kazuki en_US dc.creator Kanamori, Hideto en_US dc.date.accessioned 2008-07-15T13:51:25Z dc.date.available 2008-07-15T13:51:25Z dc.date.issued 2008 en_US dc.identifier 2008-RC-08 en_US dc.identifier.uri http://hdl.handle.net/1811/33504 dc.description Author Institution: Tokyo Institute of Technology, Department of Physics, Ohokayama; Meguro-ku, Tokyo, Japan en_US dc.description.abstract We selected slow velocity component from some polar molecules with a Maxwell-Boltzmann distribution at room temperature by using a pulsed nozzle and a quadrupole Stark guide. Time of flight spectrum gives us a velocity distribution after the velocity filter. The velocity distribution observed shows good agreement with theory based on second-order Stark effect. In case of H$_2$CO, the slowest component detected is 20 m/s, which corresponds to 1 K of the thermal energy. This result promises that mK cold molecules will become available by combining this technique with a pre-cooling process like He buffer gas cooling. We prepared a laser ablation source for that purpose, and confirmed collisional cooling process in a He buffer gas cell by using Doppler profile analysis of rapid scan spectroscopy. en_US dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title COLD MOLECULES OBTAINED BY He BUFFER GAS COOLING AND STARK VELOCITY FILTER. en_US dc.type Article en_US
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