Scintillation efficiency and ionization yield of liquid xenon for
  mono-energetic nuclear recoils down to 4 keV

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Abstract

Liquid Xenon (LXe) is an excellent material for experiments designed to detect dark matter in the form of Weakly Interacting Massive Particles (WIMPs). A low energy detection threshold is essential for a sensitive WIMP search. The understanding of the relative scintillation efficiency (Leff) and ionization yield of low energy nuclear recoils in LXe is limited for energies below 10 keV. In this paper, we present new measurements that extend the energy down to 4 keV, finding that Leff decreases with decreasing energy. We also measure the quenching of scintillation efficiency due to the electric field in LXe, finding no significant field dependence.

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A Unified Approach to the Classical Statistical Analysis of Small Signals

Gary Feldman, Robert D. Cousins (1997)

We give a classical confidence belt construction which unifies the treatment of upper confidence limits for null results and two-sided confidence intervals for non-null results. The unified treatment solves a problem (apparently not previously recognized) that the choice of upper limit or two-sided intervals leads to intervals which are not confidence intervals if the choice is based on the data. We apply the construction to two related problems which have recently been a battle-ground between classical and Bayesian statistics: Poisson processes with background, and Gaussian errors with a bounded physical region. In contrast with the usual classical construction for upper limits, our construction avoids unphysical confidence intervals. In contrast with some popular Bayesian intervals, our intervals eliminate conservatism (frequentist coverage greater than the stated confidence) in the Gaussian case and reduce it to a level dictated by discreteness in the Poisson case. We generalize the method in order to apply it to analysis of experiments searching for neutrino oscillations. We show that this technique both gives correct coverage and is powerful, while other classical techniques that have been used by neutrino oscillation search experiments fail one or both of these criteria.

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Deterioration of Anthracene under -Particle Irradiation

F Black, J Birks (1951)

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Publication date Created: 05 September 2009

Publication date Updated: 2010-01-18

Article

DOI: 10.1103/PhysRevC.81.025808

ArXiV ID: 0909.1063

SO-VID: cd73515b-3ce6-4692-8929-7d08b79abcb6

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http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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Journal reference Phys.Rev.C81:025808,2010

Comments 10 pages, 15 figures On version v4 we describe in more detail the trigger setup and have edited several figure to help the reader understand them

Scintillation efficiency and ionization yield of liquid xenon for mono-energetic nuclear recoils down to 4 keV

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Most cited references 2

A Unified Approach to the Classical Statistical Analysis of Small Signals

Deterioration of Anthracene under -Particle Irradiation

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