Trace Detection of Metastable Helium Molecules in Superfluid Helium by Laser-Induced Fluorescence

Details Trace Detection of Metastable Helium Molecules in Superfluid Helium by Laser-Induced Fluorescence Trace Detection of Metastable Helium Molecules in Superfluid Helium by Laser-Induced Fluorescence

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrvl..95k1101m&link_type=abstract

Physical Review Letters, vol. 95, Issue 11, id. 111101

Other

11

Neutrino, Muon, Pion, And Other Elementary Particle Detectors, Cosmic Ray Detectors, Tracking And Position-Sensitive Detectors, Fluorescence And Phosphorescence, Radiationless Transitions, Quenching, Ions In Liquid 4He

Scientific paper

We describe an approach to detecting ionizing radiation that combines the special properties of superfluid helium with the sensitivity of quantum optics techniques. Ionization in liquid helium results in the copious production of metastable He2 molecules, which can be detected by laser-induced fluorescence. Each molecule can be probed many times using a cycling transition, resulting in the detection of individual molecules with high signal to noise. This technique could be used to detect neutrinos, weakly interacting massive particles, and ultracold neutrons, and to image superfluid flow in liquid He4.

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