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Abstract: We have demonstrated a new, accessible and economical technique, dubbedphotostop, for producing high densities of trappable molecules. Directmeasurements are presented of NO molecules produced with a narrow velocitydistribution centered at zero in the laboratory frame. NO2, initially cooled ina pulsed molecular beam, is photodissociated such that the recoil velocity ofthe NO photofragments cancels out the velocity of the beam. NOX^2Pi 3-2, v=0,J=1.5 molecules are observed up to 10 mircoseconds after the dissociationevent in the probe volume at an estimated density of 1E7 cm-3 per quantum stateand at a translational temperature of 1.6 K. Through the choice of suitableprecursors, photostop has the potential to extend the list atoms and moleculesthat can be slowed or trapped. It should be possible to accumulate density in atrap through consecutive loading of multiple pulses.



Author: Alexandre Trottier, David Carty, Eckart Wrede

Source: https://arxiv.org/







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