Characterising a tunable, pulsed atomic beam using matter-wave interferometry

Abstract

We describe the creation and characterisation of a velocity tunable, spin-polarized beam of slow metastable argon atoms. We show that beam velocity can be determined with a precision below 1 \% using matter-wave interferometry. The profile of the interference pattern was also used to determine the velocity spread of the beam, as well as Van der Waals co-efficient for the interaction between the metastable atoms and the multi-slit silicon nitride grating. The Van der Waals co-efficient was determined to be $C_3$=1.84$\pm$0.17\,a.u., in good agreement with values derived from spectroscopic data. Finally, the spin polarization of the beam produced during acceleration of the beam was also measured, demonstrating a spatially uniform spin polarization of 96 \% in the m=+2 state.

arXiv comment8 pages, 14 figures

References in corpus (10)

• Precision Measurement of the Newtonian Gravitational Constant Using Cold Atoms
• Determination of Atom-Surface van der Waals Potentials from Transmission-Grating Diffraction Intensities
• Polarizability measurements in a molecule near-field interferometer
• A High Flux Source of Cold Rubidium
• Ion-molecule reactions below 1~K: Observation of a strong enhancement of the reaction rate of the ion-dipole reaction He${}^{+}$+ CH${}_3$F
• Reaction Studies of Neutral Atomic $\mathrm{C}$ with ${\mathrm{H}}_3^{+}$ using a Merged-Beams Apparatus
• A laser based accelerator for ultracold atoms
• Absolute absorption spectroscopy based on molecule interferometry
• Trapping cold ground state argon atoms for sympathetic cooling of molecules
• Matterwave interferometric velocimetry of cold Rb atoms

Cited by in corpus (1)

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