- Nuclear physics research studies
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Advanced Chemical Physics Studies
- Advanced Thermodynamics and Statistical Mechanics
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Spectroscopy and Quantum Chemical Studies
- Quantum Information and Cryptography
- Cold Fusion and Nuclear Reactions
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum chaos and dynamical systems
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Rare-earth and actinide compounds
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Quantum many-body systems
- Gamma-ray bursts and supernovae
- Quantum Mechanics and Applications
- stochastic dynamics and bifurcation
- Statistical Mechanics and Entropy
- Radioactive element chemistry and processing
- Quantum, superfluid, helium dynamics
Joint Institute for Nuclear Research
2016-2025
A. Alikhanyan National Laboratory
2022-2025
Ministry of Defence of Armenia
2024
Center for Ecological Noosphere Studies
2023
Yerevan State University
2009-2021
Justus-Liebig-Universität Gießen
2007-2019
Omsk State Transport University
2015
Institute of Nuclear Physics
2009
The roles of nuclear deformation and neutron transfer in sub-barrier capture process are studied within the quantum diffusion approach. change deformations colliding nuclei with exchange can crucially influence fusion. comparison calculated cross section measured fusion various reactions at extreme sub- barrier energies gives us information about quasifission.
The production cross sections of new neutron-rich $^{84,86}\mathrm{Zn}$ and $^{90,92}\mathrm{Ge}$ isotopes beyond $N=50$ are estimated for the first time in multinucleon transfer reactions $^{48}\mathrm{Ca}$ $+$ $^{238}\mathrm{U}$ $^{244}\mathrm{Pu}$. with a beam is discussed future experiments.
The role of neutron transfer with positive $Q$-value in sub-barrier capture reactions ${}^{132}$Sn,${}^{130}$Te+${}^{58,64}$Ni, and ${}^{60}$Ni+${}^{100}$Mo, measured recently by Z. Kohley et al. [Phys. Rev. Lett. 107, 202701 (2011)] F. Scarlassara [EPJ Web Conf. 17, 05002 (2011)], is studied explained within the quantum diffusion approach. It shown that two neutrons influences through change deformations colliding nuclei. Based on our analysis, one can understand why influence strong some...
The production cross sections of new neutron-rich isotopes nuclei with charge numbers $Z=64$--80 are estimated for future experiments in the multinucleon transfer reaction $^{48}\mathrm{Ca}+^{238}\mathrm{U}$ at bombarding energy ${E}_{\mathrm{c}.\mathrm{m}.}=189$ MeV close to Coulomb barrier.
Projectile-nucleus capture by a target nucleus at bombarding energies in the vicinity of Coulomb barrier is treated with reduced-density-matrix formalism. The effects dissipation and fluctuations on process are taken self-consistently into account within quantum model suggested. excitation functions for reactions $^{16}\mathrm{O}$, $^{19}\mathrm{F}$, $^{26}\mathrm{Mg}$, $^{28}\mathrm{Si}$, $^{32,34,36,38}\mathrm{S}$, $^{40,48}\mathrm{Ca}$, $^{50}\mathrm{Ti}$,...
The sub-barrier capture reactions ${}^{13,14,15}\mathrm{C}+{}^{232}\mathrm{Th}$, ${}^{4,6}\mathrm{He}+{}^{208,206}\mathrm{Pb}$, ${}^{32}\mathrm{S}+{}^{94,96,98,100}\mathrm{Mo}$, ${}^{100,102,104}$Ru, ${}^{104,106,108,110}$Pd, ${}^{112,116}$Sn, ${}^{36}\mathrm{S}+{}^{92}\mathrm{Mo}$, and ${}^{18}\mathrm{O}+{}^{112,118,124}\mathrm{Sn}$ with light weakly strongly bound nuclei are studied within the quantum diffusion approach. Based on our analysis a weak influence of halo is demonstrated in...
The sub-barrier capture (fusion) reactions $^{32}\mathrm{S}+^{90,94,96}\mathrm{Zr}$, $^{36}\mathrm{S}+^{90,96}\mathrm{Zr}$, ${}^{40}\mathrm{Ca}+^{90,94,96}\mathrm{Zr}$, and ${}^{48}\mathrm{Ca}+^{90,96}\mathrm{Zr}$ with positive negative $Q$ values for neutron transfer are studied the quantum diffusion approach universal fusion function representation. For these systems, $s$-wave probabilities extracted from experimental excitation functions also analyzed. Different effects of...
Using the experimental evaporation residue cross sections in $^{48}\mathrm{Ca}$-induced complete fusion reactions and calculated within dinuclear system model, survival probabilities of superheavy nuclei with charge numbers $Z=112\text{\ensuremath{-}}116$ 118 $\mathit{xn}$-evaporation channels are extracted. The effects angular momentum deformations colliding taken into account. obtained dependence probability on $Z$ indicates next doubly magic nucleus beyond $^{208}\mathrm{Pb}$ at...
Lumpy skin disease (LSD) is a highly infectious viral of cattle caused by LSD virus (LSDV), which was first reported in Armenia late 2015. It identified pasture-raised near the border with Iran. Currently, vaccination plays key role preventing further incursion high-risk areas. The purpose this work to assess quality currently used determining immune response heterologous dry culture sheep pox virus-based vaccine against cattle. Seroprevalence and seroconversion testing carried out using an...
Using the reduced-density-matrix formalism, interaction time of two heavy nuclei is studied. In reactions $^{136}\mathrm{Xe}+^{136}\mathrm{Xe}$ and $^{238}\mathrm{U}+^{238}\mathrm{U}$, mean variance distribution are calculated compared with those other treatments.
Sub-barrier capture reactions following neutron-pair transfer are proposed to be used for the indirect study of neutron-neutron correlation in surface region a nucleus. The strong effect dineutron-like cluster stemming from magic and nonmagic nuclei ${}^{18}$O, ${}^{48}$Ca, ${}^{64}$Ni, ${}^{94,96}$Mo, ${}^{100,102,104}$Ru, ${}^{104,106,108}$Pd, ${}^{112,114,116,118,120,124,132}$Sn is demonstrated. dominance two-neutron channel vicinity Coulomb barrier further supported by time-dependent...
Within the quantum diffusion approach, isotopic dependencies of capture cross section and mean-square angular momentum are studied in reactions ${}^{4}$He, ${}^{16}$O, ${}^{36}$S, ${}^{48}$Ca $+$ ${}^{196,200,204,208}$Pb ${}^{16}$O ${}^{70,72,74,76}$Ge. The results a reasonable agreement with existing experimental data.
Comparing the capture cross sections calculated without breakup effect and experimental complete fusion sections, was analyzed in reactions with weakly bound projectiles $^{6,7,9}$Li, $^{9,11}$Be, $^{6,8}$He. A trend of a systematic behavior for suppression as function target charge bombarding energy is not achieved. The quasielastic backscattering suggested to be an useful tool study probability projectiles.
With the quantum diffusion approach behavior of capture cross sections and mean-square angular momenta captured systems are revealed in reactions with deformed spherical nuclei at sub-barrier energies. The calculated results a good agreement existing experimental data. decreasing bombarding energy under barrier external turning point nucleus-nucleus potential leaves region short-range nuclear interaction action friction. Because this change regime interaction, an unexpected enhancement...
Employing the quadratic fermionic Hamiltonians for collective and internal subsystems with a linear coupling, we studied role of statistics on dynamics motion. The transport coefficients are discussed as well associated fluctuation-dissipation relation. Due to different nature particles, path equilibrium is slightly affected. However, in weak-coupling regime, time scale approaching found be globally unchanged. Pauli-blocking effect can modify usual picture open quantum system. In some...
The induced nuclear fission is considered a transport process over the barrier underlying dissipative forces. Using quantum master equation for reduced density matrix, influence of microscopical diffusion coefficients on total time and transient studied. effects probability first-chance estimated. For different temperatures friction coefficients, quasistationary rate compared with analytical Kramers formula.
The role of prolate and oblate deformations colliding nuclei in the sub-barrier capture process is studied within quantum diffusion approach. calculated existing experimental cross sections are compared reactions ${}^{28}$Si + ${}^{198}$Pt ${}^{40}$Ca ${}^{194}$Pt with heavy nuclei. possibility transition nucleus from potential minimum an deformation ground state to a during discussed. mean angular momenta captured systems predicted for ${}^{48}$Ca,${}^{36}$S ${}^{194}$Pt, where detection...
The role of prolate and oblate deformations colliding nuclei in the sub-barrier capture process is studied within quantum-diffusion approach. A comparison calculated measured cross sections reactions ${}^{16}\mathrm{O},{}^{48}\mathrm{Ca}+{}^{154}\mathrm{Sm}$ ${}^{74}\mathrm{Ge}+{}^{74}\mathrm{Ge}$ show that transitions during occur from potential minimum with an deformation ground state to a ${}^{154}\mathrm{Sm}$ ${}^{74}\mathrm{Ge}$. These crucially influence capture. mean-angular momenta...