Abstract
We present a method which delivers a continuous, high-density beam of slow and internally cold polar molecules. In our source, warm molecules are first cooled by collisions with a cryogenic helium buffer gas. Cold molecules are then extracted by means of an electrostatic quadrupole guide. For ND3 the source produces fluxes up to (7±47)×1010molecules/s with peak densities up to (1.0±0.61.0)×109molecules/cm3. For H2CO the population of rovibrational states is monitored by depletion spectroscopy, resulting in single-state populations up to (82±10)%.
Original language | English |
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Article number | 033001 |
Journal | Physical review letters |
Volume | 102 |
Issue number | 3 |
DOIs | |
Publication status | Published - 20 Jan 2009 |
Externally published | Yes |