S. S. Ratkevich
A5107981014- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Radioactive Decay and Measurement Techniques
- Astrophysics and Cosmic Phenomena
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- Radioactivity and Radon Measurements
- Radiation Detection and Scintillator Technologies
- Advanced NMR Techniques and Applications
- Medical Imaging Techniques and Applications
- Nuclear physics research studies
- Scientific Measurement and Uncertainty Evaluation
- Radioactive contamination and transfer
- Spacecraft and Cryogenic Technologies
- Particle accelerators and beam dynamics
- Effects of Radiation Exposure
- Calibration and Measurement Techniques
- Quantum Chromodynamics and Particle Interactions
- Astronomical Observations and Instrumentation
- Superconducting Materials and Applications
- Muon and positron interactions and applications
- Scientific Research and Discoveries
- thermodynamics and calorimetric analyses
V. N. Karazin Kharkiv National University
2016-2025
Amorepacific (South Korea)
2024
Kabardino-Balkarian Scientific Center
2016-2019
Institute for Nuclear Research
2000-2018
Kharkov Technologies
2018
The Advanced Molybdenum-based Rare process Experiment (AMoRE) aims to search for neutrinoless double beta decay (0$\nu\beta\beta$) of $^{100}$Mo with $\sim$100 kg $^{100}$Mo-enriched molybdenum embedded in cryogenic detectors a dual heat and light readout. At the current, pilot stage AMoRE project we employ six calcium molybdate crystals total mass 1.9 kg, produced from $^{48}$Ca-depleted ($^{48\textrm{depl}}$Ca$^{100}$MoO$_4$). simultaneous detection heat(phonon) scintillation (photon)...
Abstract AMoRE-II aims to search for neutrinoless double beta decay ( $$0\nu \beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>0</mml:mn> <mml:mi>ν</mml:mi> <mml:mi>β</mml:mi> </mml:mrow> </mml:math> ) with an array of 423 $$\hbox {Li}_2^{100}\hbox {MoO}_4$$ <mml:msubsup> <mml:mtext>Li</mml:mtext> <mml:mn>2</mml:mn> <mml:mn>100</mml:mn> </mml:msubsup> <mml:msub> <mml:mtext>MoO</mml:mtext> <mml:mn>4</mml:mn> </mml:msub> crystals operating in the cryogenic...
AMoRE searches for the neutrinoless double beta decay using 100 kg of enriched Mo100. Scintillating molybdate crystals coupled with a metallic magnetic calorimeter operate at milli-Kelvin temperatures to measure energy electrons emitted in decay. AMoRE-I is demonstrator full-scale AMoRE, operated Yangyang Underground Laboratory over two years. The exposure was 8.02 year (or 3.89 kgMo100 year), and total background rate near Q value 0.025±0.002 counts/keV/kg/year. We observed no indication...
We carried out the comparative study of signal from decay double $K$-shell vacancy production that follows after single electron capture $^{81}$Kr and $^{78}$Kr. The radiative a $1s$ state was identified by detecting triple coincidence two $K$ X-rays several Auger electrons in $ECEC$-decay, or (Auger + ejected electron) $EC$ decay. number vacancies per $K$-electron capture, produced as result shake-off process, has been measured for $^{81}$Kr. probability this found to be...
The AMoRE-II experiment will search for the 0 νββ decay of 100 Mo nuclei using molybdate crystal scintillators, operating at milli-Kelvin (mK) temperatures, with a total 80 kg Mo. background goal is 10 –4 counts/keV/kg/year in region interest around Q-value 3,034 keV. To achieve this level, rate signals arising from emissions produced by decays radioactive impurities detector and shielding materials must be strictly controlled. do this, concentrations such are measured controlled through...
Abstract The AMoRE collaboration searches for neutrinoless double beta decay of $$^{100}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mrow/> <mml:mn>100</mml:mn> </mml:mmultiscripts> </mml:math> Mo using molybdate scintillating crystals via low temperature thermal calorimetric detection. early phases the experiment, AMoRE-pilot and AMoRE-I, have demonstrated competitive discovery potential. Presently, AMoRE-II featuring a large detector array with...
The AMoRE (Advanced Mo-based Rare process Experiment) project is a series of experiments that use advanced cryogenic techniques to search for the neutrinoless double-beta decay \mohundred. work being carried out by an international collaboration researchers from eight countries. These searches involve high precision measurements radiation-induced temperature changes and scintillation light produced in ultra-pure \Mo[100]-enriched \Ca[48]-depleted calcium molybdate...
A calcium molybdate ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\text{CaMoO}_{4}$</tex-math></inline-formula> ) crystal scintillator, with molybdenum enriched in notation="LaTeX">$^{100}\text{Mo}$</tex-math></inline-formula> and depleted notation="LaTeX">$^{48}\text{Ca}$</tex-math></inline-formula> notation="LaTeX">$^{40}\text{Ca}{}^{100}\text{MoO}_{4}$</tex-math></inline-formula> ), was developed by...
Abstract The Advanced Mo-based Rare process Experiment (AMoRE)-Pilot experiment is an initial phase of the AMoRE search for neutrinoless double beta decay $$^{100}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow /> <mml:mn>100</mml:mn> </mml:msup> </mml:math> Mo, with purpose investigating level and sources backgrounds. Searches generally require ultimately low Surface $$\alpha $$ <mml:mi>α</mml:mi> decays on crystals themselves or nearby materials can...
The AMoRE collaboration searches for neutrinoless double beta decay of $^{100}$Mo using molybdate scintillating crystals via low temperature thermal calorimetric detection. early phases the experiment, AMoRE-pilot and AMoRE-I, have demonstrated competitive discovery potential. Presently, AMoRE-II featuring a large detector array with about 90 kg isotope, is under construction.This paper discusses baseline design characterization lithium cryogenic calorimeters to be used in modules. results...
Results of a search for ${}^{136}\mathrm{Xe}$ double \ensuremath{\beta} decay with high-pressure multiwire wall-less proportional counters at the Baksan Neutrino Observatory are presented. The experimental method and characteristics detectors described. detector background in energy range 0.5--3.5 MeV has been reduced due to event position discrimination pulse shape discrimination. analysis components different types source positions A new lower limit...
Description of the TAU-4 installation intended for long-term monitoring half-life value $T_{1/2}$ $^{212}$Po is presented. Natural thorium used as a source mother's chain. The methods measurement and data processing are described. comparative results short test measurements carried out in ground (680 h) underground (564 laboratories given. Averaged =$294.09\pm 0.07$ ns has been found level set similar one set. solar-daily variations with amplitudes $A_{So}=(11.7\pm 5.2)\times10^{-4}$...