Electron - nuclear recoil discrimination by pulse shape analysis - Physics > Instrumentation and DetectorsReport as inadecuate




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Abstract: In the framework of the ``ULTIMA- project, we use ultra cold superfluid 3Hebolometers for the direct detection of single particle events, aimed for afuture use as a dark matter detector. One parameter of the pulse shape observedafter such an event is the thermalization time constant. Until now it wasbelieved that this parameter only depends on geometrical factors and superfluid3He properties, and that it is independent of the nature of the incidentparticles. In this report we show new results which demonstrate that adifference for muon- and neutron events, as well as events simulated by heaterpulses exist. The possibility to use this difference for event discriminationin a future dark matter detector will be discussed.



Author: J. Elbs, Yu. M. Bunkov, E. Collin, H. Godfrin, O. Suvorova

Source: https://arxiv.org/



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