A5051099145- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Quantum chaos and dynamical systems
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
- High-Energy Particle Collisions Research
- Rare-earth and actinide compounds
- Nuclear Physics and Applications
- Advanced NMR Techniques and Applications
- Nuclear reactor physics and engineering
- Scientific Research and Discoveries
- Cold Fusion and Nuclear Reactions
- Nuclear Materials and Properties
- Cold Atom Physics and Bose-Einstein Condensates
- Astro and Planetary Science
- High-pressure geophysics and materials
- Advanced Thermodynamics and Statistical Mechanics
- Particle physics theoretical and experimental studies
- Superconducting Materials and Applications
- Planetary Science and Exploration
- Geotechnical and Geomechanical Engineering
- Radioactive element chemistry and processing
- Neutrino Physics Research
Institut Pluridisciplinaire Hubert Curien
2013-2024
Université de Strasbourg
2012-2024
Institute for Nuclear Research and Nuclear Energy
2024
Bulgarian Academy of Sciences
2024
Centre National de la Recherche Scientifique
2011-2023
Institut National de Physique Nucléaire et de Physique des Particules
2005-2023
Mississippi State University
2020
Institut de Physique
2014
Institute for Nuclear Research
2009
Laboratoire de Physique Théorique
1991-1996
In the framework of macroscopic-microscopic model, this study investigates fission barriers in region actinide nuclei. A very effective four-dimensional shape parametrization for fissioning nuclei is proposed. Taking, particular, left-right mass asymmetric and nonaxial shapes into account demonstrated to have a substantial effect on barrier heights. The influence proton versus neutron deformation differences potential energy landscape also discussed.
We study excited states of two-quasiparticle (2qp) character in well-deformed even-even actinide and heavier nuclei exhibiting $K$ isomerism within the framework Skyrme energy-density functional (SEDF) approach, including BCS pairing correlations with self-consistent blocking. use SIII SEDF parametrization time-odd terms seniority residual interaction as a previous magnetic moments odd-mass [Phys. Rev. C 91, 054307 (2015)]. The strength is determined through an overall fit on ${2}_{1}^{+}$...
Magnetic properties of deformed odd-mass nuclei are studied within a nonrelativistic mean-field-plus-pairing approach, namely the Skyrme-Hartree-Fock-BCS approach with self-consistent blocking. For an odd number nucleons these approaches lead to breaking time-reversal invariance. The deviation from Schmidt values isoscalar magnetic dipole moment is known result subtle balance between core-polarization effects and meson-exchange current effects. However, former usually calculated in random...
The potential-energy surfaces of an extended set heavy and superheavy even-even nuclei with $92\ensuremath{\le}Z\ensuremath{\le}126$ isospins $40\ensuremath{\le}N\ensuremath{-}Z\ensuremath{\le}74$ are evaluated within the recently developed Fourier shape parametrization. Ground-state decay properties studied for 324 different isotopes in a four-dimensional deformation space, defined by nonaxiality, quadrupole, octupole, hexadecapole degrees freedom. Nuclear energies framework...
The availability of realistic potential energy landscapes in restricted deformation space is the prerequisite starting point for modeling several nuclear properties and reactions, namely large-amplitude phenomena. achievement a macroscopic-microscopic approach, employing an innovative four-dimensional (4D) shape parametrization based on Fourier expansion, potential-energy prescription, presented. A systematic analysis 4D over extended region chart from Pt to Pu performed, searching fission...
A four-dimensional deformation space adapted to describe the fission dynamics of hot, rotating nuclei is proposed. The coordinates consisting elongation, neck formation, left-right asymmetry and nonaxiality result in barriers much lower thiner than those obtained spherical-harmonics expansion using same number parameters.
We study the evolution of $K^{\pi}=6^{+}$ and $8^{-}$ two-quasiparticle (q.p.) configurations in isotopic isotonic chains even-even deformed nuclei around $^{178}$Hf their ability to describe series observed $K$-isomer excitations within framework a Skyrme Hartree--Fock--BCS (SHFBCS) approach using SIII interaction seniority pairing strengths with self-consistent blocking. apply along prescription [Phys. Rev. C {\bf 105}, 044329 (2022)] used $K$-isomers actinide transfermium mass regions....
Macroscopic-microscopic calculations have been performed with the Yukawa folded mean field for 134 spherical even-even nuclei and 6 deformed ones at temperatures $0\ensuremath{\leqslant}T\ensuremath{\leqslant}5$ MeV elongations ranging from oblate shapes to scission configuration of fissioning nuclei. The Strutinsky type free-energy shell corrections this sample their temperature deformation dependence are found by a folding procedure in particle-number space. average single-particle...
A new parametrization of nuclear shapes is proposed as a Fourier series the square distance from symmetry axis to surface nucleus. It shown that using three lowest terms such an expansion sufficient obtain rather good reproduction form liquid-drop fission barrier. Taking into account higher order rapidly converging increases precision estimates both macroscopic and microscopic parts total binding energy.
Self-consistent calculations for excited nuclei are performed in the framework of relativistic mean-field theory at temperatures between 0 and 4 MeV 193 spherical even-even nuclei. The temperature dependent macroscopic part thermal energy was approximated by a liquid-drop type formula. average dependence single particle level-density parameter on mass isospin nucleus is established.
The macroscopic-microscopic model with the Lublin-Strasbourg drop, Strutinsky shell-correction method, and BCS approach for pairing correlations is used cranking to describe nuclear masses rotational bands in even-even Ra Cn isotopes of actinide transactinide nuclei. single-particle levels potential-energy surfaces are calculated Yukawa-folded potential using ``modified funny hills'' ($c,h$) shape parametrization. A monopole force our calculations. At equilibrium deformation strength...
The collective moment of inertia is derived analytically within the cranking model for any rotational frequency harmonic-oscillator potential well and at a finite temperature. Semiclassical shell-structure components are obtained by using periodic-orbit theory. We found semiclassically their relation to free-energy shell corrections through rigid-body statistically equilibrium rotation in terms short periodic orbits. effects exponentially disappear with increasing For case potential, one...