Transient thermal effects in solid noble gases as materials for the detection of Dark Matter

Lazanu, I.; Lazanu, S.

doi:10.1088/1475-7516/2011/07/013

Cited by 7 publications

(10 citation statements)

References 75 publications

(119 reference statements)

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“…We use here the model of the thermal spike. The dependence of the temperatures of electron and molecular subsystems on the distance to the track of the projectile (recoil), r, and on the time after its passage, t, are solutions of two coupled partial differential equations [23]:…”

Section: Resultsmentioning

confidence: 99%

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About detecting very low mass black holes in LAr detectors

Lazanu,

Pârvu

2020

Preprint

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The nature of dark matter is still an open problem. The simplest assumption is that gravity is the only force coupled certainly to dark matter and thus the micro black holes could be a viable candidate. We investigated the possibility of direct detection of micro black holes with masses around and upward the Planck scale (10 −5 g), ensuring classical gravitational treatment of these objects in the next generation of huge LAr detectors. We show that the signals (ionization and scintillations) produced in LAr enable the discrimination between micro black holes or other particles. It is expected that the trajectories of these micro black holes will appear as crossing the whole active medium, in any direction, producing uniform ionization and scintillation on all the path.

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Section: Resultsmentioning

confidence: 99%

“…Electronic and nuclear stopping powers are calculated using the procedure used by Lazanu and Lazanu in previous papers [22,23]. The energy transferred in electronic processes is used for ionization and for excitation of the electrons.…”

Section: Gravitational Electronic and Nuclear Energy Lossmentioning

confidence: 99%

About detecting very low mass black holes in LAr detectors

Lazanu,

Pârvu

2020

Preprint

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“…of different exponents p as found from experiment, does not modify drastically the solutions of the system of differential equations (1), because the atomic temperature surpasses quickly the limit of 1-2 K which is correlated to the application of the linear energy transfer [30].…”

Section: Numerical Solutions For Time and Space Dependencies Of Atomimentioning

confidence: 89%

Contribution of the electron–phonon interaction to Lindhard energy partition at low energy in Ge and Si detectors for astroparticle physics applications

Lazanu¹,

Lazanu²

2016

Astroparticle Physics

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The influence of the transient thermal effects on the partition of the energy of selfrecoils in germanium and silicon into energy eventually given to electrons and to atomic recoils respectively is studied. The transient effects are treated in the frame of the thermal spike model, which considers the electronic and atomic subsystems coupled through the electronphonon interaction. For low energies of selfrecoils, we show that the corrections to the energy partition curves due to the energy exchange during the transient processes modify the Lindhard predictions. These effects depend on the initial temperature of the target material, as the energies exchanged between electronic and lattice subsystems have different signs for temperatures lower and higher than about 15 K. Many of the experimental data reported in the literature support the model. Keywords Highlights:-Correction to the Lindhard curves of energy partition for low energy selfrecoils based on the exchange of energy during transient thermal processes between electronic and atomic subsystems -The correction is evaluated for Ge and Si selfrecoils and could improve the present limits of signals to be used in detection.-Low and high temperature limits are calculated for the correction.-A detailed and exhaustive analysis of some properties of Ge and Si, related to transient thermal effects, is performed.

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“…The dependence of the electronic and atomic temperatures on distance to the recoil trajectory and time elapsed from its passage, obtained as solution of the system of coupled differential equations from Ref. [14] are represented for the recoil which follows the 100 direction, Both the increase in the atomic and electronic temperature produced by the channelled selfrecoil are lower in respect to that produced by the disoriented one, due to the fact that the ion going straight on the <100> direction loses energy (both to the electronic and atomic subsystems) at a considerably lower rate. The time dependence of both the electronic and atomic temperature in the case of the channelled ion is much sharper.…”

Section: Wimpsmentioning

confidence: 99%

Interactions of exotic particles with ordinary matter

Lazanu¹,

Lazanu²

2012

Nuclear Instruments and Methods in Physics Research Section B:

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Weakly interacting massive particles (WIMPs) and strangelets are two classes of "exotic" particles not yet discovered, and in agreement with theoretical scenarios most probably produced in different early stages of evolution of the Universe. Some peculiarities of their energy loss in the electronic and nuclear interactions with ordinary matter are investigated. For the direct detection of WIMPs the signals produced by the stopping of recoils in matter are used for their identification. The influence of the orientation of the recoil in respect to crystal axes for crystalline silicon (as material for detectors) is analysed as average quantities: energy loss, and as transient thermal effects. For strangelets, the mechanisms of picking-up neutrons during their penetration into matter and the effects on electronic and nuclear stopping are considered. The clarification of the aspects related to the stopping of these hypothetical particles in matter will permit a better interpretation of some experimental results and could also contribute to the search for new techniques or materials for their detection, if they exist.Comment: updated version, accepted for publication in Nucl. Instr. Meth. Phys. Res.

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Transient thermal effects in solid noble gases as materials for the detection of Dark Matter

Cited by 7 publications

References 75 publications

About detecting very low mass black holes in LAr detectors

About detecting very low mass black holes in LAr detectors

Contribution of the electron–phonon interaction to Lindhard energy partition at low energy in Ge and Si detectors for astroparticle physics applications

Interactions of exotic particles with ordinary matter

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