A model of nuclear recoil scintillation efficiency in noble liquids

Mei, D. M.; Yin, Z.; Stonehill, L. C.; Hime, A.

doi:10.1016/j.astropartphys.2008.06.001

Cited by 97 publications

(99 citation statements)

References 39 publications

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“…as suggested in [62] would lead to a dependence of τ t on the density of excimer molecules. If this happened within the track of one beam ion, a higher excitation density with sulfur ions could lead to the observed shorter triplet life times.…”

Section: Time-resolved Studiesmentioning

confidence: 99%

Ion-beam excitation of liquid argon

et al. 2013

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The scintillation light of liquid argon has been recorded wavelength and time resolved with very good statistics in a wavelength interval ranging from 118 nm through 970 nm. Three different ion beams, protons, sulfur ions and gold ions, were used to excite liquid argon. Only minor differences were observed in the wavelengthspectra obtained with the different incident particles. Light emission in the wavelength range of the third excimer continuum was found to be strongly suppressed in the liquid phase. In time-resolved measurements, the time structure of the scintillation light can be directly attributed to wavelength in our studies, as no wavelength shifter has been used. These measurements confirm that the singlet-to-triplet intensity ratio in the second excimer continuum range is a useful parameter for particle discrimination, which can also be employed in wavelength-integrated measurements as long as the sensitivity of the detector system does not rise steeply for wavelengths longer than 190 nm. Using our values for the singlet-to-triplet ratio down to low energies deposited a discrimination threshold between incident protons and sulfur ions as low as ∼2.5 keV seems possible, which represents the principle limit for the discrimination of these two species in liquid argon.

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Section: Time-resolved Studiesmentioning

confidence: 99%

Ion-beam excitation of liquid argon

et al. 2013

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“…Biexcitonic collisions.-A final quenching and ionization is applied to the light signal to account for Penning effects, in which two excitons can interact to produce one exciton and one photon [74], or one photon and one electron. Both processes remove quanta from the photon signal.…”

Section: Modeling Nuclear Recoils In Liquid Xenonmentioning

confidence: 99%

Calibration, event reconstruction, data analysis, and limit calculation for the LUX dark matter experiment

Akerib¹,

Alsum²,

Araújo³

et al. 2018

Phys. Rev. D

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The LUX experiment has performed searches for dark-matter particles scattering elastically on xenon nuclei, leading to stringent upper limits on the nuclear scattering cross sections for dark matter. Here, for results derived from 1.4 × 10 4 kg days of target exposure in 2013, details of the calibration, event-reconstruction, modeling, and statistical tests that underlie the results are presented. Detector performance is characterized, including measured efficiencies, stability of response, position resolution, and discrimination between electron-and nuclear-recoil populations. Models are developed for the drift field, optical properties, background populations, the electron-and nuclear-recoil responses, and the absolute rate of low-energy background events. Innovations in the analysis include in situ measurement of the photomultipliers' response to xenon scintillation photons, verification of fiducial mass with a low-energy internal calibration source, and new empirical models for low-energy signal yield based on large-sample, in situ calibrations.

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“…The mean fraction of recoil energy lost to electrons, L (E), is described by the Lindhard model [22]. Scintillation and ionization quanta leaving the track are described by an energy-independent ratio of initial excitons and ions, followed by charge recombination according to the Thomas-Imel box model [23] and biexcitonic quenching including Penning ionization [24,25]. S1 and S2 are then generated via standard statistical distributions which model stages of detector response (collection of scintillation photons, attenuation of the ionization signal before S2 production, photoelectron and SE distributions).…”

mentioning

confidence: 99%

Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX Data

Akerib¹,

Araújo²,

Bai³

et al. 2016

Phys. Rev. Lett.

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410

626

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We present constraints on weakly interacting massive particles (WIMP)-nucleus scattering from the 2013 data of the Large Underground Xenon dark matter experiment, including 1.4 × 10 4 kg day of search exposure. This new analysis incorporates several advances: single-photon calibration at the scintillation wavelength, improved event-reconstruction algorithms, a revised background model including events originating on the detector walls in an enlarged fiducial volume, and new calibrations from decays of an injected tritium β source and from kinematically constrained nuclear recoils down to 1.1 keV. Sensitivity, especially to low-mass WIMPs, is enhanced compared to our previous results which modeled the signal only above a 3 keV minimum energy. Under standard dark matter halo assumptions and in the mass range above 4 GeV c −2 , these new results give the arXiv:1512.03506v3 [astro-ph.CO]

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A model of nuclear recoil scintillation efficiency in noble liquids

Cited by 97 publications

References 39 publications

Ion-beam excitation of liquid argon

Ion-beam excitation of liquid argon

Calibration, event reconstruction, data analysis, and limit calculation for the LUX dark matter experiment

Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX Data

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