Rellergert, W. G., Cahn, S. B., Garvan, A., Hanson, J. C., Lippincott, W. H., Nikkel, J. A. and McKinsey, D. N. (2008) Detection and Imaging of He_{2} Molecules in Superfluid Helium. Physical Review Letters, 100 (2).
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We present data that show a cycling transition can be used to detect and image metastable He2 triplet molecules in superfluid helium. We demonstrate that limitations on the cycling efficiency due to the vibrational structure of the molecule can be mitigated by the use of repumping lasers. Images of the molecules obtained using the method are also shown. This technique gives rise to a new kind of ionizing radiation detector. The use of He2 triplet molecules as tracer particles in the superfluid promises to be a powerful tool for visualization of both quantum and classical turbulence in liquid helium.
This is a Submitted version This version's date is: 15/1/2008 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/c6908d3d-6b7b-3c82-43f3-17f63e4bf43c/5/
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