I. Drachnev
A5046208749- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Atmospheric Ozone and Climate
- Solar and Space Plasma Dynamics
- Silicon and Solar Cell Technologies
- Cosmology and Gravitation Theories
- Nuclear Physics and Applications
- Nuclear physics research studies
- Quantum, superfluid, helium dynamics
- Ion-surface interactions and analysis
- Astro and Planetary Science
- Radioactive Decay and Measurement Techniques
- Nuclear reactor physics and engineering
- Advanced NMR Techniques and Applications
- Medical Imaging Techniques and Applications
- Gamma-ray bursts and supernovae
- GaN-based semiconductor devices and materials
- Stellar, planetary, and galactic studies
- Molecular Spectroscopy and Structure
- Effects of Radiation Exposure
Petersburg Nuclear Physics Institute
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2022
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2017-2022
Kurchatov Institute
2015-2022
Johannes Gutenberg University Mainz
2021
Gran Sasso Science Institute
2015-2020
University of Hawaii System
2017-2020
Forschungszentrum Jülich
2020
RWTH Aachen University
2020
A search for the solar neutrino effective magnetic moment has been performed using data from 1291.5 days exposure during second phase of Borexino experiment. No significant deviations expected shape electron recoil spectrum neutrinos have found, and a new upper limit on $\mu_{\nu}^{eff}$ $<$ 2.8$\cdot$10$^{-11}$ $\mu_{B}$ at 90\% c.l. set constraints sum fluxes implied by radiochemical gallium experiments.Using moment, limits moments flavor states, elements matrix Dirac Majorana neutrinos,...
We present the simultaneous measurement of interaction rates ${R}_{pp}$, ${R}_{\mathrm{Be}}$, ${R}_{pep}$ $pp$, $^{7}\mathrm{Be}$, and $pep$ solar neutrinos performed with a global fit to Borexino data in an extended energy range (0.19--2.93) MeV particular attention details analysis methods. This result was obtained by analyzing 1291.51 days Phase-II data, collected after extensive scintillator purification campaign. Using counts per day $(\mathrm{cpd})/100\text{ }\mathrm{ton}$ as unit, we...
We report an improved geo-neutrino measurement with Borexino from 2056 days of data taking. The present exposure is $(5.5\pm0.3)\times10^{31}$ proton$\times$yr. Assuming a chondritic Th/U mass ratio 3.9, we obtain $23.7 ^{+6.5}_{-5.7} (stat) ^{+0.9}_{-0.6} (sys)$ events. null observation geo-neutrinos alone has probability $3.6 \times 10^{-9}$ (5.9$\sigma$). A signal the mantle obtained at 98\% C.L. radiogenic heat production for U and Th best-fit result restricted to range 23-36 TW, taking...
A bstract This article describes BabyIAXO, an intermediate experimental stage of the International Axion Observatory (IAXO), proposed to be sited at DESY. IAXO is a large-scale axion helioscope that will look for axions and axion-like particles (ALPs), produced in Sun, with unprecedented sensitivity. BabyIAXO conceived test all subsystems (magnet, optics detectors) relevant scale final system thus serve as prototype IAXO, but same time fully-fledged physics reach itself, potential discovery....
We present an improved measurement of the carbon-nitrogen-oxygen (CNO) solar neutrino interaction rate at Earth obtained with complete Borexino Phase-III dataset. The measured rate, R_{CNO}=6.7_{-0.8}^{+2.0} counts/(day×100 tonnes), allows us to exclude absence CNO signal about 7σ C.L. correspondent flux is 6.6_{-0.9}^{+2.0}×10^{8} cm^{-2} s^{-1}, taking into account flavor conversion. use new evaluate C and N abundances in Sun respect H abundance for first time neutrinos. Our result...
This paper presents a comprehensive geoneutrino measurement using the Borexino detector, located at Laboratori Nazionali del Gran Sasso (LNGS) in Italy. The analysis is result of 3262.74 days data between December 2007 and April 2019. describes improved techniques optimized selection, which includes enlarged fiducial volume sophisticated cosmogenic veto. reported exposure (1.29±0.05)×1032 protons ×year represents an increase by factor two over previous 2015. By observing...
We report on an improved measurement of the $^{8}\mathrm{B}$ solar neutrino interaction rate with Borexino experiment at Laboratori Nazionali del Gran Sasso. Neutrinos are detected via their elastic scattering electrons in a large volume liquid scintillator. The measured scattered above 3 MeV energy is ${0.223}_{\ensuremath{-}0.016}^{+0.015}(\mathrm{stat}){\text{ }}_{\ensuremath{-}0.006}^{+0.006}(\mathrm{syst})\text{ }\text{ }\mathrm{cpd}/100\text{ }\mathrm{t}$, which corresponds to observed...
We report the first measurement of CNO solar neutrinos by Borexino that uses Correlated Integrated Directionality (CID) method, exploiting sub-dominant Cherenkov light in liquid scintillator detector. The directional information origin is preserved fast photons from neutrino scattered electrons, and used to discriminate between signal background. independent spectral on which previous measurements were based. While analysis could only be applied Phase-III dataset, can use complete data...
Borexino is a liquid scintillation detector located deep underground at the Laboratori Nazionali del Gran Sasso (LNGS, Italy). Thanks to unmatched radio-purity of scintillator, and well understood response low energy, new limit on stability electron for decay into neutrino single mono-energetic photon was obtained. This bound, tau > 6.6 10**28 yr 90 % C.L., two orders magnitude better than previous limit.
The Borexino experiment concluded the data acquisition at end of 2021 and among solar neutrino experiments it has been only one capable reconstructing position energy on an event-by-event base, with threshold 150 keV, thanks to its ultra-high radio-purity. experimental techniques analysis methods that allowed reach such unprecedented levels radio-purity are now a standard legacy leaves next low neutrinos rare event searching experiments. This contribution is aimed present main achievements...
We have measured the flux of cosmic muons in Laboratori Nazionali del Gran Sasso at 3800 m w.e. to be (3.432 ± 0.003)⋅ 10−4 m−2s−1 based on ten years Borexino data acquired between May 2007 and 2017. A seasonal modulation with a period (366.3 0.6) d relative amplitude (1.36 ±0.04)% is observed. The phase (181.7 0.4) d, corresponding maximum 1st July. Using inferred from global atmospheric models, we show muon positively correlated temperature measure effective coefficient αT = 0.90 0.02....
Liquid scintillator detectors play a central role in the detection of neutrinos from various sources. In particular, it is only technique used so far for precision spectroscopy sub-MeV solar neutrinos, as demonstrated by Borexino experiment at Gran Sasso National Laboratory Italy. The benefit high light yield, and thus low energy threshold good resolution, comes cost directional information featured water Cherenkov detectors, measuring 8B above few MeV. this paper we provide first...
If heavy neutrinos with mass mνH≥2me are produced in the Sun via decay B8→Be8+e++νH a side branch of pp chain, they would undergo observable into an electron, positron and light neutrino νH→νL+e++e−. In present work Borexino data used to set bound on existence such decays. We constrain mixing 1.5 MeV≤mνH≤14 MeV be |UeH|2≤(10−3−4×10−6), respectively. These tighter limits parameters than obtained previous experiments at nuclear reactors accelerators.Received 27 May...
We discuss the physics case for and concept of a medium-scale axion helioscope with sensitivities in axion-photon coupling few times better than CERN Axion Solar Telescope (CAST). Search an axion-like particle these couplings is motivated by several persistent astrophysical anomalies. present early conceptual design, existing infrastructure, projected sensitivity timeline such (Troitsk Experiment, TASTE) to be constructed Institute Nuclear Research, Troitsk, Russia. The proposed instrument...
Abstract Neutrinos emitted in the carbon, nitrogen, oxygen (CNO) fusion cycle Sun are a sub-dominant, yet crucial component of solar neutrinos whose flux has not been measured yet. The Borexino experiment at Laboratori Nazionali del Gran Sasso (Italy) unique opportunity to detect them directly thanks detector’s radiopurity and precise understanding detector backgrounds. We discuss sensitivity CNO neutrinos, which is based on strategies we adopted constrain rates two most relevant background...
We present the results of a low-energy neutrino search using Borexino detector in coincidence with gravitational wave (GW) events GW150914, GW151226 and GW170104. searched for correlated energies greater than 250 keV within time window $\pm500$ s centered around GW detection time. A total five candidates were found all three This is consistent number expected solar background events. As result, we have obtained best current upper limits on event fluence flavors ($\nu_e, \nu_{\mu},...