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.

arXiv comment7 pages, 4 figures. accepted for publication in New Journal of Physics

References in corpus (4)

• Improved Spin-Dependent WIMP Limits from a Bubble Chamber
• Improved Spin Dependent Limits from the PICASSO Dark Matter Search Experiment
• Response of Superheated Droplet Detectors of the PICASSO Dark Matter Search Experiment
• SIMPLE Dark Matter Search Results

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