Potential Dark Matter Detector? The Detection of Low Energy Neutrons by Superfluid 3He

Details Potential Dark Matter Detector? The Detection of Low Energy Neutrons by Superfluid 3He Potential Dark Matter Detector? The Detection of Low Energy Neutrons by Superfluid 3He

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phrvl..75.1887b&link_type=abstract

Physical Review Letters, Volume 75, Issue 10, September 4, 1995, pp.1887-1890

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Using an existing experiment we have demonstrated in a pilot study that superfluid 3He at 100 μK can be used as a nuclear recoil detector sensitive to neutron and γ interactions depositing energies down to a few hundred eV. The deposited energy is converted to 3He quasiparticles which are detected by their damping effect on a vibrating wire resonator in the liquid. The system can be calibrated independently but a convenient fixed point is provided by the exothermic reaction n+32He = p+31H+764 keV. Given the great potential for improvement we propose that the system might make a sensitive weakly interacting massive particle detector.

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