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20 April 2024

» arxiv » 1011.4553

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New Insights into Particle Detection with Superheated Liquids
S. Archambault ; F. Aubin ; M. Auger ; M. Beleshi ; E. Behnke ; J. Behnke ; B. Beltran ; K. Clark ; X. Dai ; A. Davour ; F. Debris. J. Farine ; M.-H. Genest ; G. Giroux ; R. Gornea ; R. Faust ; H. Hinnefeld ; A. Kamaha ; C. B. Krauss ; M. Lafrenière ; M. Laurin ; I. Lawson ; C. Leroy ; C. Lévy ; L. Lessard ; I. Levine ; J.-P. Martin ; S. Kumaratunga ; R. MacDonald ; R. Nadeau ; A. Noble ; M.-C. Piro ; S. Pospisil ; N. Starinski ; I. Stekl ; N. Vander Werf ; U. Wichoski ; V. Zacek ;
Date:	20 Nov 2010
Abstract:	We report new results obtained in calibrations of superheated liquid droplet detectors used in dark matter searches with different radiation sources (n,$alpha$,$gamma$). In particular, detectors were spiked with alpha-emitters located inside and outside the droplets. It is shown that the responses are different, depending on whether alpha particles or recoil nuclei create the signals. The energy thresholds for $alpha$-emitters are compared with test beam measurements using mono-energetic neutrons, as well as with theoretical predictions. Finally a model is presented which describes how the observed intensities of particle induced acoustic signals can be related to the dynamics of bubble growth in superheated liquids. An improved understanding of the bubble dynamics is an important first step in obtaining better discrimination between particle types interacting in detectors of this kind.
Source:	arXiv, 1011.4553
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