A5036606977- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear reactor physics and engineering
- Radioactive Decay and Measurement Techniques
- Rare-earth and actinide compounds
- Advanced NMR Techniques and Applications
- Neutrino Physics Research
- Nuclear Materials and Properties
- Advanced Chemical Physics Studies
- Atomic and Subatomic Physics Research
- Radioactive contamination and transfer
- Dark Matter and Cosmic Phenomena
- Mass Spectrometry Techniques and Applications
- Radiopharmaceutical Chemistry and Applications
- High-Energy Particle Collisions Research
- Gamma-ray bursts and supernovae
- Cold Fusion and Nuclear Reactions
- Laser-induced spectroscopy and plasma
- Spectral Theory in Mathematical Physics
- Medical Imaging Techniques and Applications
- Chemical Thermodynamics and Molecular Structure
Comenius University Bratislava
2016-2025
KU Leuven
2019-2023
University of Jyväskylä
2020
Helsinki Institute of Physics
2020
The mean-square charge radii of $^{207,208}\mathrm{Hg}$ ($Z=80$, $N=127$, 128) have been studied for the first time and those $^{202,203,206}\mathrm{Hg}$ ($N=122$, 123, 126) remeasured by application in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). characteristic kink in $N=126$ neutron shell closure has revealed, providing information on its behavior below $Z=82$ proton closure. A theoretical analysis performed within relativistic Hartree-Bogoliubov nonrelativistic...
The neutron-deficient Hg isotopes have been a paradigm for nuclear shape coexistence. ground states of these nuclei exhibit striking structural differences from the neighboring Pb isotopes, and are very challenging to study experimentally. Here, new state-of-the-art data extend information on charge radii (and electromagnetic moments) lightest ever measured using laser spectroscopy. results suggest sudden decrease in deformation an end region ground-state staggering. These provide...
Low-energy $\ensuremath{\beta}$-delayed fission of $^{194,196}\mathrm{At}$ and $^{200,202}\mathrm{Fr}$ was studied in detail at the mass separator ISOLDE CERN. The fission-fragment distributions daughter nuclei $^{194,196}\mathrm{Po}$ $^{202}\mathrm{Rn}$ indicate a triple-humped structure, marking transition between asymmetric $^{178,180}\mathrm{Hg}$ symmetric light Ra-Rn nuclei. Comparison with macroscopic-microscopic finite-range liquid-drop model self-consistent approach employing Gogny...
Hyperfine-structure parameters and isotope shifts of $^{195--211}\mathrm{At}$ have been measured for the first time at CERN-ISOLDE, using in-source resonance-ionization spectroscopy method. The hyperfine structures isotopes were recorded a triad experimental techniques monitoring photo-ion current. Multi-Reflection Time-of-Flight Mass Spectrometer, in connection with high-resolution electron multiplier, was used as an ion-counting setup that either affected by strong isobaric contamination...
Hyperfine-structure constants for the $6s{\phantom{\rule{0.28em}{0ex}}}^{2}{S}_{1/2}$ and $6p{\phantom{\rule{0.28em}{0ex}}}^{2}{P}_{1/2}$ atomic states of ${I}^{\ensuremath{\pi}}=11/{2}^{\ensuremath{-}}$ gold isomers $^{177,191,193,195}\mathrm{Au}^{m}$ have been measured at CERN-ISOLDE, using in-source laser resonance-ionization spectroscopy technique. From hyperfine differences between anomalies these deduced. These differential anomaly values used to determine $6s$-state relative stable...
Polonium isotopes having two protons above the shell closure at Z=82 show a wide variety of low-lying, high-spin isomeric states across whole chain. The structure neutron-deficient up to ^{210}Po (N=126) is well established as they are easily produced through various methods. However, there not much information available for neutron-rich counterparts which only selective techniques can be used their production. We report on first fast-timing measurements yrast 8^{+} level in ^{214,216,218}Po...
Decay properties of the very neutron-deficient isotopes ${}^{197--199}$Fr were studied at velocity filter Separator for Heavy Ion reaction Products (SHIP) GSI in Darmstadt. The produced $2n--4n$ evaporation channels fusion-evaporation ${}^{60}$Ni+${}^{141}$Pr $\ensuremath{\rightarrow}$ ${}^{201}$Fr*. Improved $\ensuremath{\alpha}$-decay ${}^{199}$Fr determined and possible existence two $\ensuremath{\alpha}$-decaying states this nucleus is discussed. For isotope ${}^{198}$Fr a broad energy...
The changes in mean-squared charge radii of neutron-deficient gold nuclei have been determined using the in-source, resonance-ionization laser spectroscopy technique, at ISOLDE facility (CERN). From these new data, nuclear deformations are inferred, revealing a competition between deformed and spherical configurations. isotopes ^{180,181,182}Au observed to possess well-deformed ground states and, when moving lighter masses, sudden transition near-spherical shapes is seen extremely nuclides,...
The first accurate measurements of the α-decay branching ratio and half-life Iπ=1/2+ ground state in 181Tl have been made, along with determination magnetic moments I=1/2 spin assignments states 177,179Au. results are discussed within complementary systematics reduced widths nuclear g factors low-lying, neutron-deficient lead region. findings shed light on unexpected hindrance 1/2+→1/2+, 181Tl→g177Aug α decay, which is explained by a mixing π3s1/2 π2d3/2 configurations 177Aug, whilst 181Tlg...
Decay properties of the neutron-deficient nuclides ${}^{201--203}\mathrm{Ra}$ and ${}^{200--202}\mathrm{Fr}$ were investigated using $\ensuremath{\alpha}$- $\ensuremath{\gamma}$-decay spectroscopy. The nuclei produced in fusion-evaporation reactions ${}^{56}$Fe projectiles with enriched ${}^{147}$Sm ${}^{149}$Sm targets at velocity filter SHIP GSI Darmstadt (Germany). $\ensuremath{\alpha}$ decay from (3/2${}^{\ensuremath{-}}$) state ${}^{201}$Ra was identified an energy...
A detailed <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi>β</a:mi></a:math>-decay study of the low- and high-spin states in <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mmultiscripts><b:mi>Bi</b:mi><b:mprescripts/><b:none/><b:mn>216</b:mn></b:mmultiscripts></b:math> has been performed at ISOLDE Decay Station CERN-ISOLDE facility. In total, 48 new levels 83 transitions <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mi>β</c:mi></c:math>-decay daughter <d:math...
The near-symmetric complete fusion reaction $^{78}\mathrm{Kr}+^{107}\mathrm{Ag}\ensuremath{\rightarrow}^{185}\mathrm{Bi}^{*}$ was studied at the gas-filled recoil separator SHANS with an attempt to synthesize extremely neutron-deficient proton-unbound $^{182,183}\mathrm{Bi}$ isotopes. No decay events which could be attributed them were observed. two- and three-particle evaporation residues $^{180,179}\mathrm{Hg}$ ($\ensuremath{\alpha}p, \ensuremath{\alpha}pn$) $^{183,182}\mathrm{Pb}$ ($pn,...
Spontaneous fission properties of the isotopes $^{255}\mathrm{Rf}$, $^{256}\mathrm{Rf}$, and $^{258}\mathrm{Rf}$ produced in reactions $^{50}\mathrm{Ti}+^{207}\mathrm{Pb}$, $^{50}\mathrm{Ti}+^{208}\mathrm{Pb}$, $^{50}\mathrm{Ti}+^{209}\mathrm{Bi}$ were studied. The method time position correlations was used to identify spontaneous events. correction energy deficit measured total kinetic (TKE) determined on basis a study $^{252}\mathrm{No}$ applied evaluate $\overline{\mathrm{TKE}}$...
Combining laser spectroscopy in a Versatile Arc Discharge and Laser Ion Source (VADLIS) with Penning-trap mass spectrometry at the CERN-ISOLDE facility, this work reports on mean-square charge radii of neutron-rich mercury isotopes across $N=126$ shell closure, electromagnetic moments $^{207}\mathrm{Hg}$, more precise values $^{206\text{--}208}\mathrm{Hg}$. The odd-even staggering (OES) mean square kink are analyzed within framework covariant density functional theory (CDFT), comparisons...
Hyperfine-structure parameters and isotope shifts for the 795-nm atomic transitions in At217,218,219 have been measured at CERN-ISOLDE, using in-source resonance-ionization spectroscopy technique. Magnetic dipole electric quadrupole moments, changes nuclear mean-square charge radii, deduced. A large inverse odd-even staggering which may be associated with presence of octupole collectivity, has observed. Namely, radius odd-odd At218 found to larger than average its even-N neighbors,...