Title :
Photo-Mechanical Effect of Photoassociation : a New Method to Measure the Scattering Length of Ultracold Metastable Helium Atoms
Author :
Kim, J. ; Moal, S. ; Portier, M. ; Leduc, M.
Author_Institution :
Dept. of Phys., Myongji Univ., Yongin
Abstract :
We report on a new method to detect photoassociation resonance signals with the collective dipole oscillations induced by the excitation laser momentum in a cold atomic cloud confined in a magnetic trap. A precise value for the s-wave scattering length, a=7.48(+0.29/-0.36) nm is found, which agrees well with our previous measurements.
Keywords :
association; atom-atom reactions; atom-photon collisions; helium neutral atoms; laser cooling; metastable states; photochemistry; radiation pressure; resonant states; He; cold atomic cloud; collective dipole oscillations; excitation laser momentum; helium atoms; magnetic trap; metastable atoms; photoassociation; photomechanical effect; resonance signals; scattering length; ultracold atoms; Atomic beams; Atomic measurements; Helium; Laser excitation; Length measurement; Magnetic confinement; Magnetic resonance; Metastasis; Scattering; Signal detection;
Conference_Titel :
Lasers and Electro-Optics - Pacific Rim, 2007. CLEO/Pacific Rim 2007. Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-1173-3
Electronic_ISBN :
978-1-4244-1174-0
DOI :
10.1109/CLEOPR.2007.4391555
