Discrimination of nuclear recoils from alpha particles with superheated liquids

Abstract

The PICASSO collaboration observed for the first time a significant difference between the acoustic signals induced by neutrons and alpha particles in a detector based on superheated liquids. This new discovery offers the possibility of improved background suppression and could be especially useful for dark matter experiments. This new effect may be attributed to the formation of multiple bubbles on alpha tracks, compared to single nucleations created by neutron induced recoils.

7 pages, 4 figures. accepted for publication in New Journal of Physics

References in corpus (1)

• Improved Spin-Dependent WIMP Limits from a Bubble Chamber

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• Final Results of the PICASSO Dark Matter Search Experiment
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• Direct Detection of Dark Matter -- APPEC Committee Report
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• A Simple Model of Energy Threshold for Snowball Chambers
• The Dark Matter Search at Jaduguda Underground Science Laboratory