Channeling in solid Xe, Ar and Ne direct dark matter detectors

Bozorgnia, Nassim; Gelmini, Graciela B.; Gondolo, Paolo

doi:10.1016/j.nima.2011.06.053

Cited by 7 publications

(7 citation statements)

References 31 publications

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“…It should be admitted that the relevant science is still insufficiently advanced. It is more or less developed and reliable for single-element crystals of the type Si, Ge [20], Xe, Ar, Ne [21], etc. A single-element approximation is used for KCl crystals on the assumption that the masses of K and Cl ions are the same and have a certain intermediate value.…”

Section: Comments On a Channeling Efficiencymentioning

confidence: 99%

Daemons: Detection at Pulkovo, Gran Sasso and Soudan

Drobyshevski

Ponyaev

et al. 2012

Mod. Phys. Lett. A

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During a week of the March maximum in 2011, two oppositely installed direction-sensitive TEU-167dDark Electron Multipliers (DEMs) recorded a flux of daemons from the near-Earth almost circular heliocentric orbits (NEACHOs). The flux measured from above is f ≈ (8±3)×10 -7 cm -2 s -1 , and that from below is twice smaller. The difference may be due both to specific design features of the TEUs themselves, and to dissimilarities in the slope of trajectories along which objects are coming from above or from below. It is shown that the daemon paradigm enables a quantitative interpretation of DAMA andCoGeNT experiments with no additional hypotheses. Both the experiments record a daemon flux of f ~ 10 -6 cm -2 s -1 from strongly elongated Earth-crossing heliocentric orbits (SEECHOs), predecessors of NEACHOs. Recommendations are given for processing of DAMA/LIBRA data, which unambiguously suggest that, in approximately half of cases (when there occur double events in the detector, rejected in processing under a single-hit criterion), the signals being recorded are successively excited by a single SEECHO object along a path of ~1 m, i.e., this is not a WIMP. It is noted that due regard to cascade events and pair interaction of ions will weaken the adverse influence exerted by the blocking effect on the channeling of iodine ions knocked out in NaI(Tl) crystal. This influence will become not so catastrophic as it follows from simplified semi-analytical models of the process: one might expect the energy of up to ~10% of primary recoil iodine ions will be converted to the scintillation light.

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Section: Comments On a Channeling Efficiencymentioning

confidence: 99%

Daemons: Detection at Pulkovo, Gran Sasso and Soudan

Drobyshevski

Ponyaev

et al. 2012

Mod. Phys. Lett. A

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“…This can be particularly important in the case where DM is in the form of Strongly Interacting Massive Particles [5,6] or mirror dark matter [7,8]. Moreover, diurnal modulated DM signals can emerge from channelling effects in the detectors, since DM-nuclei scatterings from specific directions might have no quenching [9,10]. Additionally, there can be a modulation in the DM signal due to gravitational focusing [11].…”

Section: Introductionmentioning

confidence: 99%

Daily modulation and gravitational focusing in direct dark matter search experiments

Kouvaris

Nielsen

2015

Phys. Rev. D

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We study the effect of gravitational focusing of the earth on dark matter. We find that the effect can produce a detectable diurnal modulation in the dark matter signal for part of the parameter space which for high dark matter masses is larger than the diurnal modulation induced by the fluctuations in the flux of dark matter particles due to the rotation of the earth around its own axis. The two sources of diurnal modulation have different phases and can be distinguished from each other. We demonstrate that the diurnal modulation can potentially check the self-consistency of experiments that observe annual modulated signals that can be attributed to dark matter. Failing to discover a daily varying signal can result conclusively to the falsification of the hypothesis that the annual modulation is due to dark matter. We also suggest that null result experiments should check for a daily modulation of their rejected background signal with specific phases. A potential discovery could mean that dark matter collisions have been vetoed out.

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“…Very recently, there is growing interest [13][14][15] in using solid noble gases as materials for the detection of new weakly interacting massive particles (WIMPs) within the scope of search for Dark Matter, neutrinoless double-beta decay, coherent neutrino scattering. Of the advantages of using solid noble gases as targets for WIMPs is that these targets allow read out 3 signals at a time: phonon, ionization and scintillation.…”

Section: Introductionmentioning

confidence: 99%

“…Of the advantages of using solid noble gases as targets for WIMPs is that these targets allow read out 3 signals at a time: phonon, ionization and scintillation. Also they provide more scintillation light, faster drifting electrons, higher ionization yield, no background contamination through circulation loop (no convection mix), possible container-free design, no outgassing issue, less sensitivity to mechanical vibrations [15,16]. Xenon and neon have no long life radioisotopes and thus contain no intrinsic background source of radiation.…”

Section: Introductionmentioning

confidence: 99%

ECR study of electron photoemission from gas solids

Dmitriev

2013

Physica B: Condensed Matter

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Channeling in solid Xe, Ar and Ne direct dark matter detectors

Cited by 7 publications

References 31 publications

Daemons: Detection at Pulkovo, Gran Sasso and Soudan

Daemons: Detection at Pulkovo, Gran Sasso and Soudan

Daily modulation and gravitational focusing in direct dark matter search experiments

ECR study of electron photoemission from gas solids

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