Experimental setup for the growth of solid crystals of inert gases for particle detection

Guarise, M.; Braggio, C.; Calabrese, R.; Carugno, G.; Dainelli, A.; Khanbekyan, A.; Luppi, E.; Mariotti, E.; Poggi, M.; Tomassetti, L.

doi:10.1063/1.5003296

Cited by 8 publications

(6 citation statements)

References 31 publications

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“…To embed guest atoms in the condensed phase, according to the Matrix Isolation Technique, we have assembled a cryogenic facility at the Legnaro National Laboratory. 10 As shown in Fig. 3, a pulse-tube cryocooler provides the low temperature cold finger where crystals can be grown.…”

Section: Preliminary Resultsmentioning

confidence: 99%

New ideas on prospective low energy threshold detectors for dark matter searches

Calabrese

Guarise

Khanbekyan

et al. 2020

Int. J. Mod. Phys. Conf. Ser.

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Low energy threshold detectors are necessary in many frontier fields of experimental physics. In particular, these are extremely important for probing possible dark matter (DM) candidates. We present a novel detection approach that exploits the energy levels of atoms maintained at cryogenic temperature. We exploit laser-assisted transitions that are triggered by the absorption of the incident particle in the material and lead to the emission of a fluorescent photon or an electron. In this approach, the incident particle will in fact excite the first low-lying energy level that is then up-converted using an opportune narrow-band laser system. Two different detection schemes are thus possible in our active material: one is based on a photon signal while the other takes advantage of high efficiency in-vacuum charge detection.

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Section: Preliminary Resultsmentioning

confidence: 99%

New ideas on prospective low energy threshold detectors for dark matter searches

Calabrese

Guarise

Khanbekyan

et al. 2020

Int. J. Mod. Phys. Conf. Ser.

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“…Prior to being sprayed, the gas passed within a purification system that allows an impurity contamination below the ppb level especially for highelectronegativity elements. This system is described with more specific details in a previous paper [31]. The Rubidium dispenser (SAES Getter) is connected through two vacuumfeedthroughs to a power supply that delivers up to 6 A necessary to sublimate the metal.…”

Section: Dilute Rubidium Atoms In a Solid Argon And Neon Matrix: Expe...mentioning

confidence: 99%

“…Recently, possible detection schemes for cosmological axions in the meV energy range, based on electron transitions between Zeeman-shifted levels of dilute alkali or oxygen atoms [12], or their ionization [11], embedded in a solid matrix of inert gases at cryogenic temperatures [31], have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy of Alkali Atoms in Solid Matrices of Rare Gases: Experimental Results and Theoretical Analysis

et al. 2022

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We present an experimental and theoretical investigation of the spectroscopy of dilute alkali atoms in a solid matrix of inert gases at cryogenic temperatures, specifically Rubidium atoms in a solid Argon or Neon matrix, and related aspects of the interaction energies between the alkali atoms and the atoms of the solid matrix. The system considered is relevant for matrix isolation spectroscopy, and it is at the basis of a recently proposed detector of cosmological axions, exploiting magnetic-type transitions between Zeeman sublevels of alkali atoms in a magnetic field, tuned to the axion mass, assumed in the meV range. Axions are one of the supposed constituents of the dark matter (DM) of the Universe. This kind of spectroscopy could be also relevant for the experimental search of new physics beyond the Standard Model, in particular the search of violations of time-reversal or parity-charge-conjugation (CP) symmetry. In order to efficiently resolve the axion-induced transition in alkali-doped solid matrices, it is necessary to reduce as much as possible the spectral linewidth of the electronic transitions involved. The theoretical investigation presented in this paper aims to estimate the order of magnitude of the inhomogeneous contribution to the linewidth due to the alkali–matrix interactions (Coulomb/exchange and dispersion), and to compare the theoretical results with our experimental measurements of spectra of dilute Rubidium atoms in Argon and Neon solid matrix. The comparison of the expected or measured spectral linewidths will be important for selecting the most appropriate combination of alkali atoms and matrix inert elements to be used in the proposed axion detection scheme. It is finally suggested that dilute Lithium atoms diffused in a cold parahydrogen solid matrix could be, overall, a good system upon which the proposed detector could be based.

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“…Prior to be sprayed, the gas passed within a purification system that allows an impurity contamination below the ppb level especially for high-electronegativity elements. This system is described with more specific details in a previous paper [22]. The Rubidium dispenser 4 is connected through two vacuum-feedthroughs to a power supply that delivers up to 6 A necessary to sublimate the metal.…”

Section: Dilute Rubidium Atoms In a Solid Argon And Neon Matrix: Expe...mentioning

confidence: 99%

“…In the cases we consider in this paper, relevant for DM search, all atoms or molecules considered have not permanent dipole moments, and thermal effects are also strongly reduced by the use of cryogenic temperatures (some Kelvin) [1][2][3]. a solid matrix of inert gases at cryogenic temperatures [22], have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy of Rubidium atoms in solid matrices of rare gases: experimental results and theoretical analysis

Braggio,

Calabrese,

Carugno

et al. 2021

Preprint

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Matrix Isolation Spectroscopy of atoms or molecules has recently been proposed also for investigating new physics beyond the Standard Model with atoms and molecules, such as search for time-reversal or CP symmetry violations, electric dipole moment of standard-model particles, as well as DM [4][5][6][7].Cosmological axions are supposed to be one of the possible constituents of the DM of the Universe, whose composition is still unknown [8]. Axions were initially introduced by Peccei and Quinn in order to solve the strong CP problem in quantum chromodynamics [9][10][11][12], and are assumed to interact very weakly with ordinary matter. Successively, it was proposed that they could be one of the possible constituents of DM [13], and Sikivie proposed that they could induce magnetic-type transitions between atomic Zeeman sub-levels, yielding possibility of their indirect detection [14]. It is thus of fundamental importance to envisage possible mechanisms, and relative experiments, to detect these particles. Several possibilities have been recently proposed; for a review, see for example [13,[15][16][17][18][19].Recently, possible detection schemes for cosmological axions in the meV energy range, based on electron transitions between Zeeman-shifted levels of dilute alkali or oxygen atoms [20], or their ionization [21], embedded in

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Experimental setup for the growth of solid crystals of inert gases for particle detection

Cited by 8 publications

References 31 publications

New ideas on prospective low energy threshold detectors for dark matter searches

New ideas on prospective low energy threshold detectors for dark matter searches

Spectroscopy of Alkali Atoms in Solid Matrices of Rare Gases: Experimental Results and Theoretical Analysis

Spectroscopy of Rubidium atoms in solid matrices of rare gases: experimental results and theoretical analysis

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