A5047160922- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Muon and positron interactions and applications
- Atmospheric Ozone and Climate
- Electrostatic Discharge in Electronics
- Radioactive Decay and Measurement Techniques
- Nuclear reactor physics and engineering
- Crystallography and Radiation Phenomena
- Technology-Enhanced Education Studies
- Solar and Space Plasma Dynamics
- ECG Monitoring and Analysis
- Atomic and Subatomic Physics Research
- Pulsed Power Technology Applications
- Lipid metabolism and disorders
- Non-Invasive Vital Sign Monitoring
- Integrated Circuits and Semiconductor Failure Analysis
- Innovative Teaching Methods
- Diabetes Management and Research
- Pharmacological Effects of Natural Compounds
City Clinical Hospital
2025
Moscow City Hospital No 29
2024
Institute for Nuclear Research
2012-2023
Chechen State Pedagogical Institute
2022
Pedagogical University
2022
Russian Academy of Sciences
2000-2017
The Russian-American experiment SAGE began to measure the solar neutrino capture rate with a target of gallium metal in December 1989. Measurements have continued only few brief interruptions since that time. In this article we present experimental improvements its last published data summary 2001. Assuming production was constant during period collection, combined analysis 168 extractions through 2007 gives neutrinos energy more than 233 keV $65.{4}_{\ensuremath{-}3.0}^{+3.1}$ (stat)...
This white paper addresses the hypothesis of light sterile neutrinos based on recent anomalies observed in neutrino experiments and latest astrophysical data.
The solar neutrino capture rate measured by the Russian-American Gallium Experiment (SAGE) on metallic gallium during period January 1990 through December 1997 is ${67.2}_{\ensuremath{-}7.0\ensuremath{-}3.0}^{+7.2+3.5}$ SNU, where uncertainties are statistical and systematic, respectively. This represents only about half of predicted standard model 129 SNU. All experimental procedures, including extraction germanium from gallium, counting ${}^{71}\mathrm{Ge},$ data analysis, discussed in detail.
The Baksan Experiment on Sterile Transitions (BEST) was designed to investigate the deficit of electron neutrinos ν_{e} observed in previous gallium-based radiochemical measurements with high-intensity neutrino sources, commonly referred as "gallium anomaly," which could be interpreted evidence for oscillations between and sterile (ν_{s}) states. A 3.414-MCi ^{51}Cr source placed at center two nested Ga volumes were made production ^{71}Ge through charged current reaction,...
The solar neutrino capture rate measured by SAGE is well below that predicted models. To check the overall experimental efficiency, we exposed 13 tonnes of Ga metal to a reactor-produced 517 kCi source ${}^{51}$Cr. ratio production from activity $0.95\ifmmode\pm\else\textpm\fi{}0.11(\mathrm{stat})+0.05/\ensuremath{-}0.08(\mathrm{syst})$. This agreement verifies efficiency correctly, establishes there are no unknown systematic errors at 10% level, and provides considerable evidence for...
The neutrino capture rate measured by the Russian-American Gallium Experiment is well below that predicted solar models. To check response of this experiment to low-energy neutrinos, a 517 kCi source ${}^{51}$Cr was produced irradiating 512.7 g 92.4%-enriched ${}^{50}$Cr in high-flux fast neutron reactor. This source, which mainly emits monoenergetic 747-keV placed at center 13.1 ton target liquid gallium and cross section for production ${}^{71}$Ge inverse beta decay $\mathrm{reaction}{...
An intense source of $^{37}\mathrm{Ar}$ was produced by the $(n,\ensuremath{\alpha})$ reaction on $^{40}\mathrm{Ca}$ irradiating 330 kg calcium oxide in fast neutron breeder reactor at Zarechny, Russia. The released from solid target dissolution acid, collected this solution, purified, sealed into a small source, and brought to Baksan Neutrino Observatory where it used irradiate 13 tonnes gallium metal Russian-American solar neutrino experiment SAGE. Ten exposures whose initial strength...
First results from the BEST Collaboration searching for short-baseline neutrino oscillations to sterile neutrinos with a high-intensity ${}^{51}$Cr monoenergetic source reaffirm that so-called gallium anomaly, deficit in electron neutrinos, persists. $4\ensuremath{\sigma}$ deficits were observed ${}^{71}$Ge production rates at two different distance scales, which could be interpreted as between an and hypothetical neutrino. The are consistent mass squared difference above about 0.5...
The Russian-American solar neutrino experiment has measured the capture rate of neutrinos on metallic gallium in a radiochemical at Baksan Neutrino Observatory. Eight years measurement give result ${67.2}_{\ensuremath{-}7.0\ensuremath{-}3.0}^{+7.2+3.5}$ units, where uncertainties are statistical and systematic, respectively. restrictions these results impose vacuum oscillation parameters given.
The ${}^{71}$Ga radiochemical experiments provided the first constraint on flux of low-energy electron neutrinos coming from Sun. Crucial neutrino calibration experiments, however, using intense $\ensuremath{\beta}$-decay sources, yielded rates below that predicted by theory. A recent effort to check ``gallium anomaly'' a more source exacerbated discrepancy. This paper carefully reexamines nuclear physics absorption ${}^{71}$Ga, slightly reducing but not eliminating puzzling anomaly.
$\mathcal{O}(1)\mathrm{eV}$ sterile neutrino can be responsible for a number of anomalous results oscillation experiments. This hypothesis may tested at short base line experiments, several which are either ongoing or under construction. Here, we concentrate on the so-called gallium anomaly, found by SAGE and GALLEX its foreseeable future tests with BEST experiment Baksan Neutrino Observatory. We start revision neutrino-gallium cross section that is performed utilizing recent measurements...
BACKGROUND: Dialysis treatment is a risk factor for the development of carbohydrate metabolism disorders (CMD) and glycemia variability (VG) in patients with chronic kidney disease (CKD). AIM: To analyse impact renal replacement therapy (RRT) on CMD CKD without history diabetes mellitus (DM). MATERIALS AND METHODS: 90 were examined DM (60 RRT using program hemodialysis (pHD) continuous ambulatory peritoneal dialysis (CAPD) 30 3–5 (without RRT)). Patients collected anamnesis, measured level...
Numerous anomalous results in neutrino oscillation experiments can be attributed to the interference of an $\ensuremath{\sim}1\text{ }\text{ }\mathrm{eV}$ sterile neutrino. The Baksan Experiment on Sterile Transitions (BEST), specially designed fully explore Gallium anomaly, starts next year. We investigate sensitivity BEST search a mixed with electron Then, performing combined analysis all (SAGE, GALLEX, BEST), we find region model parameter space (sterile mass and mixing angle) which will...
Baksan Experiment on Sterile Neutrino (BEST) [Gavrin et al., arXiv:1006.2103; Gavrin al.Phys. Part. Nucl. 46, 131 (2015); Rev. D 93, 073002 (2016)] is presently at the stage of production artificial neutrino source $^{51}\mathrm{Cr}$, and gallium exposure will start in July proceed for three months. While aiming specifically investigating anomaly (SAGE GALLEX experiments) [Abdurashitov Phys. C 59, 2246 (1999); Abdurashitov C73, 045805 (2006); Kaether Lett. B 685, 47 (2010)], BEST can do...
Abstract At the Baksan Neutrino Observatory (Institute for Nuclear Research of Russian Academy Sciences, Moscow) deployed in Caucasus mountains, it is proposed to create, at a depth corresponding about 4700 mwe (meter water equivalent), large-volume neutrino detector on basis liquid scintillator with target mass 10 kt. This article describes current state first stage project, namely prototype 0.5 t. The design detector, equipment and methods used are described.
Experiments to study non-standard properties of neutrinos using high-intensity artificial neutrino sources require high accuracy in determining their activity. A calorimetric system determine the activity a 51Cr source experiment BEST with an better than 1% was created. The design and main factors affecting measurements are considered. results made for presented. value from 3.41 MCi at beginning experiment.