Superheated emulsion in neutron spectrometry

Das, Mala; Sawamura, Sadashi; Sawamura, Teruko

doi:10.1016/j.apradiso.2005.05.029

Cited by 1 publication

(1 citation statement)

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“…The situation is different for L c , where a large range of values is quoted. Since R c is the natural length scale of the process, L c is usually given in terms of L c = bR c , where b varies from author to author: L c = 2 R c appears to be intuitively justified and is supported by data for low energy thresholds below 20 keV; [14] following arguments of stability of vapour jets in liquids, whereas some authors propose L c = (ρ v /ρ l ) 1/3 R c ≈ 6.6R c , but also values up to 18 have been reported [12,13,14,15,16,17,18,19]. As described in section 8, our recent results from calibration measurements with mono-energetic neutrons and alpha emitters in PICASSO shed additional light on this controversial issue.…”

Section: Detection Principle and Theoretical Modelmentioning

confidence: 68%

New Insights into Particle Detection with Superheated Liquids

Archambault,

Aubin,

Auger

et al. 2010

Preprint

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We report new results obtained in calibrations of superheated liquid droplet detectors used in dark matter searches with different radiation sources (n,α,γ). 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 α-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.

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