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Producing translationally cold, ground-state CO molecules.

Janneke H Blokland1, Jens Riedel, Stephan Putzke

  • 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.

The Journal of Chemical Physics
|September 29, 2011
PubMed
Summary
This summary is machine-generated.

Cold carbon monoxide (CO) molecules for trapping experiments are produced using Stark deceleration and optical transfer. This method creates translationally cold ground-state CO molecules, essential for shallow electric trap experiments.

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Area of Science:

  • Molecular physics
  • Quantum chemistry
  • Laser spectroscopy

Background:

  • Ground-state carbon monoxide (CO) molecules are ideal for trapping experiments.
  • Envisioned optical or AC electric traps for CO molecules are shallow, requiring sub-milliKelvin temperatures.
  • Producing translationally cold CO molecules in the ground state (X(1)Σ(+), v'' = 0, N'' = 0) is challenging.

Purpose of the Study:

  • To outline a method for producing translationally cold ground-state CO molecules.
  • To demonstrate an optical transfer scheme for metastable CO molecules.
  • To determine properties of intermediate quantum states.

Main Methods:

  • Stark deceleration of laser-prepared metastable CO (a(3)Π(1)) molecules.
  • Optical transfer of metastable CO to the ground state via perturbed A(1)Π levels.
  • Experimental determination of radiative lifetimes and electric dipole moments.

Main Results:

  • A viable method for producing cold, ground-state CO molecules was established.
  • The optical transfer scheme was experimentally demonstrated.
  • Radiative lifetimes and electric dipole moments of intermediate A(1)Π state levels were determined.

Conclusions:

  • The presented method enables the production of cold ground-state CO molecules suitable for shallow electric trap experiments.
  • The optical transfer technique is effective and provides insights into molecular properties.
  • This research advances capabilities for cold molecule research and precision measurements.