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Preprint
A direct test of Auger cascade induced nucleation from heavy element contamination in C$_3$F$_8$ bubble chambers
ArXiv.org
26 Oct 2021
Abstract
Understanding and quantifying the gamma-induced bubble nucleation background
in clean nuclear recoil detection bubble chambers is of utmost importance to
bubble chamber based dark matter searches. We present data confirming the
hypothesis that large Auger cascades from high-Z elements such as iodine and
xenon dramatically increase the response of C$_3$F$_8$ bubble chambers to gamma
rays. These tests, performed with a small calibration bubble chamber filled
with C$_3$F$_8$+$\mathcal{O}$(10) ppm xenon, show that the probability of
bubble nucleation scales with the rate of xenon inner-shell vacancies, reaching
values >$10\%$ per K-Shell vacancy for Seitz thresholds of interest to future
dark matter searches in bubble chambers. We also place an upper limit on bubble
nucleation probability for argon Auger events, relevant to large future bubble
chambers which may contain some residual atmospheric argon after the active
fluid fill.
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Details
- Title
- A direct test of Auger cascade induced nucleation from heavy element contamination in C$_3$F$_8$ bubble chambers
- Creators
- M BresslerN LambR NeilsonS Windle
- Publication Details
- ArXiv.org
- Resource Type
- Preprint
- Language
- English
- Academic Unit
- Physics
- Other Identifier
- 991021863140704721