A5069610837- Neutrino Physics Research
- Atomic and Molecular Physics
- Nuclear physics research studies
- Advanced Chemical Physics Studies
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Radioactive Decay and Measurement Techniques
- Muon and positron interactions and applications
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
- Pulsars and Gravitational Waves Research
Kurchatov Institute
2019-2023
The ground state to electron-capture Q value of ^{159}Dy (3/2^{-}) has been measured directly using the double Penning trap mass spectrometer JYFLTRAP. A 364.73(19) keV was obtained from a measurement cyclotron frequency ratio decay parent and daughter ^{159}Tb ions novel phase-imaging ion-cyclotron resonance technique. values for allowed Gamow-Teller transition 5/2^{-} third-forbidden unique 11/2^{+} with excitation energies 363.5449(14) 362.050(40) in were determined be 1.18(19) 2.68(19)...
A precise determination of the atomic mass $^{75}$As has been performed utilizing double Penning trap spectrometer, JYFLTRAP. The excess is measured to be -73035.519(42) keV/c$^2$, which a factor 21 more and 1.3(9) keV/c$^2$ lower than adopted value in newest Atomic Mass Evaluation (AME2020). This used determine ground-state-to-ground-state electron-capture decay $Q$ $^{75}$Se $\beta^-$ $^{75}$Ge, are derived 866.041(81) keV 1178.561(65) keV, respectively. Using nuclear energy-level data...
A precise determination of the ground state $^{111}$In ($9/2^+$) electron capture to $^{111}$Cd ($1/2^+$) $Q$ value has been performed utilizing double Penning trap mass spectrometer, JYFLTRAP. 857.63(17) keV was obtained, which is nearly a factor 20 more than extracted from Atomic Mass Evaluation 2020 (AME2020). The high-precision electron-capture measurement along with nuclear energy level data 866.60(6) keV, 864.8(3) 855.6(10) and 853.94(7) for used determine whether four states are...
Double-β decay is accompanied with a high probability by the excitation of electron shell daughter atom; as result, energy carried away β electrons decreases. The mean value and standard deviation atom in double-β germanium $$_{{32}}^{{76}}{\text{Ge}} \to \;_{{34}}^{{76}}{\text{Se}}\text{*} + \;2{{\beta }^{ - }}( 2{{\bar {\nu }}_{e}})$$ have been determined within Thomas–Fermi relativistic Dirac–Hartree–Fock methods. Using estimates thus obtained, two-parameter model spectrum neutrinoless...
The excitation of electron shell a daughter atom in neutrinoless double $\beta$-decay causes change shape the total energy peak $\beta$ electrons at end spectrum. main parameters modified distribution are average and variance shell. We derive an expression for taking into account exchange effects make numerical estimates based on non-relativistic Roothaan-Hartree-Fock method relativistic Dirac-Hartree-Fock implemented General Relativistic Atomic Structure Package (Grasp2018). Estimates made...
The problem of the transition electron shells atoms to excited states in process neutrinoless double-$\beta$ decay is investigated. This subject crucial for modeling energy spectrum $\beta$-electrons, which sensitive mass and Majorana nature neutrinos. dependence obtained results on atomic number indicates determining role Feinberg--Migdal effect shell excitations. We report overlap amplitudes parent atom daughter ion eleven atoms, two-neutrino was observed experimentally. In around...