arXiv subjects

A. E. Solomatin

Publications and source records attributed to A. E. Solomatin.

5 recordsLinked to original sources

arXiv2026

The Dark Photon in the PHELEX Experiment

This paper presents diurnal measurements of the single-electron count rate in the PHELEX experiment using multi-cathode counters over the period from 2023 to 2026. The results obtained are interpreted as an indication of a possible effect from dark photons with masses ranging from 10 to 40 eV. The correlation of the measured rates in counters with Fe and Al cathodes suggests that the effect does not depend on the magnetic properties of the cathode material. This can be interpreted as an argument against many dark matter models related to magnetic moments. The result, if confirmed in an independent experiment, could narrow the range of possible candidates to those that interact primarily through an electric (or longitudinal) field, insensitive to spin. A dark photon with kinetic mixing fits this description ideally.

hep-ex↗

arXiv2025

PHELEX: Three Series Of Measurements in the Search for Dark Photons

This paper presents the results of measurements of diurnal variations in the single electron count rate arising from dark photon conversion at the cathode of a gas proportional counter. Three experimental series were conducted, each consisting of 4 runs lasting approximately 60 days per run. One can expect an excess in the single electron count rate above the average level if the polarization vector of dark photons in the region traversed by the Sun forms an angle between 20 and 50 degrees with the Earth's rotational axis. Such an effect was observed in the first series (significance 6 sigma) and the second series (significance 4 sigma). However, in the third series, which employed two identical detectors simultaneously, the effect was not observed on either detector. This result practically excludes the possibility that the effect observed earlier was purely instrumental. The results of the three series may be interpreted as a possible effect arising from the Sun's passage through regions of dark matter characterized by different orientations of the dark photon polarization vector.

hep-ex↗

arXiv2014

Gaseous Detector with sub keV Threshold to Study Neutrino Scattering at Low Recoil Energies

Gaseous detector with a sub keV electron equivalent threshold is a very perspective tool for the precision measurement of the neutrino magnetic moment and to observe coherent scattering of neutrinos on nuclei. The progress in the development of low noise electronics makes it possible to register the rare events at the threshold less than 100 eV. The construction of the gaseous detector is given and the typical pulses with amplitudes of a few eV observed on a bench scale installation are presented. The possible implications for future experiments are discussed.

physics.ins-det↗

arXiv2013

Large Gaseous Detector of Ionizing Eradiation in Search for Coherent Neutrino-Nucleus Scattering

We propose to search for coherent neutrino-nucleus scattering (CNNS)by means of a triple-sectioned low background proportional counter. As a working medium we plan to use argon and xenon at about 1 MPa. We have shown using bench-scale assembly, that pulse-shape discrimination enables to effectively suppress noise pulses from electromagnetic disturbances and microphonic effect in the energy region where one expects signal from CNNS (from 20 eV to 100 eV) with a factor of about $10^3$. The calculation has been done of the background from neutrons, generated by muons of cosmic rays. The experimental setup has been proposed.

physics.ins-det↗

arXiv2009

A Lithium-Beryllium Method for the Detection of Solar Neutrinos

A method for the detection of solar neutrino has been developed using the laboratory bench installations. The efficiency of the extraction of beryllium from lithium as high as 96.4{%} has been achieved, and it was shown that lithium losses during the extraction were less than 1{%}. The prospects of a full-scale experiment with a 10-t lithium detector consisting of twenty 500-kg lithium modules are discussed. The technical solutions formulated on the basis of this study enable to make design of a pilot lithium installation containing 500 kg of metallic lithium

nucl-ex↗