S. Eliseev
A5089900194- Nuclear physics research studies
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- Nuclear Physics and Applications
- High-Energy Particle Collisions Research
- Mass Spectrometry Techniques and Applications
- Advanced Chemical Physics Studies
- Radioactive Decay and Measurement Techniques
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Nuclear reactor physics and engineering
- Dark Matter and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Radioactive contamination and transfer
- Muon and positron interactions and applications
- Cold Atom Physics and Bose-Einstein Condensates
- Scientific Measurement and Uncertainty Evaluation
- Scientific Research and Discoveries
- Radioactive element chemistry and processing
- X-ray Spectroscopy and Fluorescence Analysis
- Analytical Chemistry and Sensors
- Quantum, superfluid, helium dynamics
Max Planck Institute for Nuclear Physics
2016-2025
Petersburg Nuclear Physics Institute
2005-2019
St Petersburg University
2019
Kurchatov Institute
2019
Russian Academy of Sciences
2015
Max Planck Society
2008-2013
Max Planck Institute of Psychiatry
2012
GSI Helmholtz Centre for Heavy Ion Research
2005-2011
University of Jyväskylä
2010
Research Association for Combustion Engines
2006-2009
We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved - cosmology, astrophysics, nuclear, particle physics in each case viewed both theoretical experimental/observational perspectives. After reviewing the role active neutrinos physics, we focus on context Matter puzzle. Here, first motivation for based challenges tensions purely cold scenarios. then round out discussion by critically summarizing known...
The masses of six neutron-deficient rare holmium and thulium isotopes close to the proton drip line were determined with SHIPTRAP Penning trap mass spectrometer. For first time proton-unbound 144,145Ho 147,148Tm directly measured. separation energies derived from measured values compared predictions formulas. new are used determine location for more accurately.Received 26 October 2006DOI:https://doi.org/10.1103/PhysRevLett.100.012501©2008 American Physical Society
A novel approach based on the projection of Penning-trap ion motion onto a position-sensitive detector opens door to very accurate mass measurements ppb level even for short-lived nuclides with half-lives well below second. In addition accuracy boost, new method provides superior resolving power by which low-lying isomeric states excitation energy 10-keV can be easily separated from ground state. measurement difference ^{130}Xe and ^{129}Xe has demonstrated great potential approach.
Quantum-mechanical shell effects are expected to strongly enhance nuclear binding on an "island of stability" superheavy elements. The predicted center at proton number $Z=114,120$, or $126$ and neutron $N=184$ has been substantiated by the recent synthesis new elements up $Z=118$. However location extension island stability remain vague. High-precision mass spectrometry allows direct measurement energies thus determination strength effects. Here, we present such measurements for nobelium...
The atomic mass difference of (163)Ho and (163)Dy has been directly measured with the Penning-trap spectrometer SHIPTRAP applying novel phase-imaging ion-cyclotron-resonance technique. Our measurement solved long-standing problem large discrepancies in Q value electron capture determined by different techniques. shifts current 2555(16) eV evaluated Atomic Mass Evaluation 2012 [G. Audi et al., Chin. Phys. C 36, 1157 (2012)] more than 7σ to 2833(30(stat))(15(sys)) eV/c(2). With new it will be...
Neutrinos, and in particular their tiny but non-vanishing masses, can be considered one of the doors towards physics beyond Standard Model. Precision measurements kinematics weak interactions, 3H β-decay 163Ho electron capture (EC), represent only model independent approach to determine absolute scale neutrino masses. The experiment, ECHo, is designed reach sub-eV sensitivity on mass by means analysis calorimetrically measured spectrum nuclide 163Ho. maximum energy available for this decay,...
In this Letter, we present mass-ratio measurements on highly charged <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi>Yb</a:mi></a:mrow><a:mrow><a:mn>42</a:mn><a:mo>+</a:mo></a:mrow></a:msup></a:mrow></a:math> ions with a precision of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mn>4</c:mn><c:mo>×</c:mo><c:msup><c:mn>10</c:mn><c:mrow><c:mo>−</c:mo><c:mn>12</c:mn></c:mrow></c:msup></c:math> and isotope-shift...
A measurement of direct photon production in ${}^{208}\mathrm{Pb}{+}^{208}\mathrm{Pb}$ collisions at $158A$ GeV has been carried out the CERN WA98 experiment. The invariant yield photons central is extracted as a function transverse momentum interval $0.5<{p}_{T}<4\mathrm{GeV}/c$. significant signal, compared to statistical and systematical errors, seen ${p}_{T}>1.5\mathrm{GeV}/c$. result constitutes first observation ultrarelativistic heavy-ion collisions. It could be for diagnosis...
The masses of very neutron-deficient nuclides close to the astrophysical rp- and νp-process paths have been determined with Penning trap facilities JYFLTRAP at JYFL/Jyväskylä SHIPTRAP GSI/Darmstadt. Isotopes from yttrium (Z=39) palladium (Z=46) produced in heavy-ion fusion-evaporation reactions. In total, 21 were studied, almost half mass values experimentally for first time: 88Tc, 90−92Ru, 92−94Rh, 94,95Pd. For 95Pdm, (21/2+) high-spin state, a direct determination was performed. Relative...
In the search for nuclide with largest probability neutrinoless double-electron capture, we have determined Q(ϵϵ) value between ground states of (152)Gd and (152)Sm by Penning-trap mass-ratio measurements. The new 55.70(18) keV results in a half-life 10(26) yr 1 eV neutrino mass. With this smallest among known 0νϵϵ transitions, is promising candidate capture.
Abstract The magnetic moment μ of a bound electron, generally expressed by the g -factor =− B s ħ −1 with Bohr magneton and electron’s spin, can be calculated bound-state quantum electrodynamics (BS-QED) to very high precision. recent ultra-precise experiment on hydrogen-like silicon determined this value eleven significant digits, thus allowed rigorously probe validity BS-QED. Yet, investigation one most interesting contribution -factor, relativistic interaction between electron nucleus, is...
Penning-trap mass spectrometry in atomic and nuclear physics has become a well-established reliable tool for the determination of masses. In combination with short-lived radioactive nuclides it was first introduced at ISOLTRAP Isotope Mass Separator On-Line facility (ISOLDE) CERN. Penning traps have found new applications coupling to other production mechanisms, such as in-flight separation systems. The range from structure studies related precision tests theoretical approaches description...
Double-beta processes play a key role in the exploration of neutrino and weak interaction properties, searches for effects beyond Standard Model. During last half century many attempts were undertaken to search double-beta decay with emission two electrons, especially its neutrinoless mode ($0\nu2β^-$), latter being still not observed. Double-electron capture (2EC) was focus so far because general lower transition probability. However, rate double-electron ($0\nu2$EC) can experience...
The nuclides 104-108Sn, 106-110Sb, 108,109Te, and 111I at the expected endpoint of astrophysical rp process have been produced in 58Ni+natNi fusion-evaporation reactions IGISOL their mass values were precisely measured with JYFLTRAP Penning trap spectrometer. For 106Sb, 108Sb, 110Sb these are first direct experimental results obtained. related one-proton separation energies derived value for Sp=424(8) keV, shows that branching into closed SnSbTe cycle is weaker than expected.
The theory of octupolar-excitation ion-cyclotron-resonance mass spectrometry is presented which predicts an increase up to several orders magnitude in resolving power under certain conditions. new method has been applied for a direct Penning-trap mass-ratio determination the (164)Er-(164)Dy doublet. (164)Er candidate search neutrinoless double-electron capture. However, measured Q(ϵϵ) value 25.07(12) keV results half-life 10(30) years 1 eV Majorana-neutrino mass.
We probe the N=82 nuclear shell closure by mass measurements of neutron-rich cadmium isotopes with ISOLTRAP spectrometer at ISOLDE-CERN. The new ^{132}Cd offers first value N=82, two-neutron gap below Z=50 and confirms phenomenon mutually enhanced magicity ^{132}Sn. Using recently implemented phase-imaging ion-cyclotron-resonance method, ordering low-lying isomers in ^{129}Cd their energies are determined. experimental findings used to test large-scale shell-model, mean-field,...