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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

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Absolute metastable atom-atom collision cross section measurements using a magneto-optical trap.

K J Matherson¹, R D Glover, D E Laban

¹Centre for Quantum Dynamics, Griffith University, Nathan QLD 4111, Australia.

The Review of Scientific Instruments

|August 4, 2007

Summary

We developed a new method to measure collision cross sections for metastable neon atoms. This technique was used to determine the cross section for neon atoms colliding with argon, yielding 556+/-26 A(2).

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Area of Science:

Atomic physics
Quantum mechanics
Collision cross sections

Background:

Metastable atoms are crucial in various physical and chemical processes.
Measuring collision cross sections provides fundamental insights into atomic interactions.

Purpose of the Study:

To introduce a novel technique for measuring absolute total collision cross sections of metastable neon atoms.
To perform the first measurement of this kind using trapped metastable neon atoms.

Main Methods:

Utilizing the decay rate of trapped metastable neon atoms.
Observing collisions between trapped (3)P(2) metastable neon atoms and room temperature ground state argon atoms.

Main Results:

Successfully measured the absolute total collision cross section for metastable neon-argon interactions.
Obtained a cross section value of 556+/-26 A(2).

Conclusions:

The new technique provides a reliable method for determining collision cross sections of metastable atoms.
The measured cross section offers valuable data for understanding neon-argon interactions at the atomic level.