Modeling emission of acoustic energy during bubble expansion in PICO bubble chambers

@article{Kozynets2019ModelingEO,
  title={Modeling emission of acoustic energy during bubble expansion in PICO bubble chambers},
  author={Tetiana Kozynets and Scott Fallows and Carsten B. Krauss},
  journal={Physical Review D},
  year={2019}
}
The PICO experiment uses bubble chambers filled with superheated C$_3$F$_8$ for spin-dependent WIMP dark matter searches. One of the main sources of background in these detectors is alpha particles from decays of environmental $^{222}\mathrm{Rn}$, which nucleate bubbles that are visually indistinguishable from WIMP candidate events. Alpha-induced bubbles can be discriminated acoustically, because the signal from alpha events is consistently larger in magnitude than that from nuclear recoil/WIMP… 
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