A5001293983- Nuclear physics research studies
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- High-Energy Particle Collisions Research
- X-ray Spectroscopy and Fluorescence Analysis
- Cold Fusion and Nuclear Reactions
- Quantum Chromodynamics and Particle Interactions
- Quantum, superfluid, helium dynamics
- Particle physics theoretical and experimental studies
- Fashion and Cultural Textiles
- Nuclear Materials and Properties
- Cultural Industries and Urban Development
- Advanced Chemical Physics Studies
- Laser-induced spectroscopy and plasma
- Digital Media and Visual Art
- Magnetic confinement fusion research
- Radioactive Decay and Measurement Techniques
- X-ray Diffraction in Crystallography
- Boron Compounds in Chemistry
- Complex Systems and Time Series Analysis
- Neural Networks and Applications
- Laser-Plasma Interactions and Diagnostics
- Statistical Mechanics and Entropy
National Centre for Nuclear Research
2016-2024
Vietnam National University Ho Chi Minh City
2024
University of Warsaw
2010-2019
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2017
Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2017
Universidad Nacional Autónoma de México
2017
University of Messina
2017
University of Catania
2017
Università degli Studi di Enna Kore
2017
A complete set of existing data on hot fusion reactions leading to synthesis superheavy nuclei $Z=114--118$, obtained in a series experiments Dubna and later GSI Darmstadt LBNL Berkeley, was analyzed terms an angular-momentum-dependent version the fusion-by-diffusion (FBD) model with fission barriers ground-state masses taken from Warsaw macroscopic-microscopic (involving nonaxial shapes) Kowal et al. The only empirically adjustable parameter model, injection-point distance...
We present a new experimental method to correlate the isotopic composition of intermediate mass fragments (IMF) emitted at midrapidity in semiperipheral collisions with emission timescale: IMFs early stage reaction show larger values $\ensuremath{\langle}N/Z\ensuremath{\rangle}$ isospin asymmetry, stronger angular anisotropies, and reduced odd-even staggering effects neutron proton ratio distributions than those produced sequential statistical emission. All these support concept...
We present a modified version of the Fusion by Diffusion (FBD) model aimed at describing synthesis superheavy nuclei in cold fusion reactions, which low excited compound nucleus emits only one neutron. The FBD accounts for angular momentum dependence three basic factors determining evaporation residue cross section: capture section ${\ensuremath{\sigma}}_{\text{cap}}(l)$, probability ${P}_{\text{fus}}(l)$, and survival ${P}_{\text{surv}}(l)$. hindrance factor, inverse is treated terms...
Excitation functions for fusion-$xn$ evaporation reaction channels induced by $^{48}\mathrm{Ca}$ as well heavier projectiles (usually leading to smaller cross sections) on actinide targets were calculated in the framework of fusion-by-diffusion (FBD) model. For first time, this approach, which a proton ($pxn$) or alpha particle ($\ensuremath{\alpha}xn$) is evaporated have been included step de-excitation cascade. To calculate synthesis sections entry data such fission barriers, ground-state...
Predictions based on the "Fusion by Diffusion" model in a version adapted for calculating xn channels, with ground-state masses, shell effects and barrier heights as given Muntian, Patyk Sobiczewski are presented. Sensitivity of to uncertainties determination theoretical fission barriers is discussed. concerning formation element Z = 120 include comparison fusion most asymmetric systems, 50 Ti + 249 Cf 54 Cr 248 Cm , less combinations 58 Fe 244 Pu 64 Ni 238 U .
Background: In heavy-ion collisions at intermediate energies the production of light charged particles and mass fragments (IMFs) is due to different reaction mechanisms time scales, ranging from fast dynamical processes statistical emission equilibrated system.Purpose: We compare IMF probabilities in a neutron-rich $^{124}\mathrm{Sn}+^{64}\mathrm{Ni}$ system neutron-poor $^{112}\mathrm{Sn}+^{58}\mathrm{Ni}$ laboratory energy 35 $A$ MeV.Method: The IMFs mechanism semiperipheral reactions has...
A project of using a target consisting the mixture (249-252)Cf isotopes to be bombarded with 48Ca beam, aimed synthesize new heaviest known element Z = 118, is under way at FLNR in Dubna. In present work excitation functions for all reactions: 249Cf(48Ca,xn)(297-x)118, 250Cf(48Ca,xn)(298-x)118, 251Cf(48Ca,xn)(299-x)118 and 252Cf(48Ca,xn)(300-x)118 have been calculated framework fusion-by-diffusion model, assuming fission barriers, ground-state masses shell effects superheavy nuclei predicted...
Predictions of relatively large cross sections (of about 1 picobarn) for synthesis super heavy nuclei Z=122 and Z=124 in cold fusion (1n) reactions symmetric 154Sm + 150Nd systems by R.K. Choudhury Y.K. Gupta (2014) [1] are examined. The authors state that this result had been obtained using the fusion-by-diffusion (FBD) model. As predictions original FBD model Swiatecki, Cap, Siwek-Wilczyńska Wilczyński definitely pessimistic regarding more (in comparison with equivalent asymmetric...
Data from the experiment on 197Au + reaction at 23 AMeV are analyzed with an aim to find signatures of exotic nuclear configurations such as toroid-shaped objects. The experimental data compared predictions ETNA code dedicated look for and QMD model. A novel criterion selecting events possibly resulting formation freeze-out configurations, "the efficiency factor", is tested. Comparison between model may indicate flat/toroidal systems.
We investigated decays of ^{51,52,53}K at the ISOLDE Decay Station CERN in order to understand mechanism β-delayed neutron-emission (βn) process. The experiment quantified neutron and γ-ray emission paths for each precursor. used this information test hypothesis, first formulated by Bohr 1939, that neutrons βn process originate from structureless "compound nucleus." data are consistent with postulate most observed decay paths. agreement, however, is surprising because compound-nucleus stage...
This study investigates the $^{51}\mathrm{V}+^{159}\mathrm{Tb}\ensuremath{\rightarrow}^{210}\mathrm{Ra}^{*}$ reaction through measurements of both entrance-channel barrier distribution and detailed excitation functions for $xn, pxn$, $\ensuremath{\alpha}xn$ channels over a wide energy range. research extends systematic studies reactions involving beams heavier than $^{48}\mathrm{Ca}$ on deformed heavy targets, linking cross section to side-collision configuration effects observed in...
The fusion probability for the production of superheavy nuclei in cold reactions was investigated and compared with recent experimental results $^{48}\mathrm{Ca}, ^{50}\mathrm{Ti}$, $^{54}\mathrm{Cr}$ incident on a $^{208}\mathrm{Pb}$ target. Calculations were performed within fusion-by-diffusion model (FbD) using new nuclear data tables by Jachimowicz et al. [At. Data Nucl. Tables 138, 101393 (2021)]. It is shown that could be well explained framework FbD model. saturation at bombarding...
First results of a study partitioning the nonfusing 197Au + 197Au system at an energy 23A MeV are reported. A variety light, medium and heavy fragments were detected identified by using 4π multidetector CHIMERA (Charged Heavy Ion Mass Energy Resolving Array). new method identification low-energy stopped in silicon detectors, based on precise time-of-flight analysis, is proposed. The has been applied preliminary analysis processes leading to neck emission intermediate mass sequential breakup...
In May 1911 Ernest Rutherford published a paper The Scattering of α-and β-particles by Matter and the Structure Atom.Now it is usually considered to be birth certificate atomic nucleus.Rutherford's results are presented discussed in wider context physics views that time.
This article summarizes recent progress in our understanding of the reaction mechanisms leading to formation superheavy nuclei cold and hot fusion reactions. Calculations are done within Fusion-by-Diffusion (FBD) model using new nuclear data tables by Jachimowicz et al. [At. Data Nucl. Tables 138, 101393 (2021)]. The synthesis is treated a standard way as three-step process (i.e., capture, fusion, survival). Each step analyzed separately. Model calculations compared with selected...
In nuclear reactions at Fermi energies two and multi particles intensity interferometry correlation methods are powerful tools in order to pin down the characteristic time scale of emission processes. this paper we summarize an improved application fragment-fragment function specific physics case heavy projectile-like (PLF) binary massive splitting fragments intermediate mass(IMF). Results shown for reverse kinematics reaction 124Sn+64 Ni 35 AMeV that has been investigated by using forward...
The results of experiments carried out at GSI Darmstadt, LBNL Berkeley and RIKEN Tokyo on the synthesis superheavy nuclei Z = 104–113 in cold fusion reactions have been analyzed within fusion-by-diffusion (FBD) model by using fission barriers, ground-state masses, shell effects deformations calculated with Warsaw macroscopic–microscopic model. An empirical parametrization injection-point distance has established for this new theoretical input to FBD that enables one reproduce existing data...
Ternary partitions of the + system in collisions at 23 A MeV beam energy have been studied. It is observed that mass number distribution lightest fragments, called intermediate fragments (IMF), extends up to numbers corresponding into three comparable fragments. The IMFs show well known features prompt emission originating from interaction zone (neck) during reseparation. Heavier (of ) definitely originate sequential (but not equilibrated) decay primary projectile-like (PLF*) (or target-like...
Fusion - fission probabilities in the synthesis of heaviest elements are discussed context latest experimental reports. Cross sections for superheavy nuclei evaluated using "Fusion by Diffusion" (FBD) model. Predictive power this approach is shown experimentally known Lv, Og isotopes and predictions given Z=119,120. Ground state saddle point properties as: masses, shell corrections, pairing energies deformations necessary cross section estimations calculated systematically within...
Abstract The neutron rich carbon isotope 15 C is the only known case of an almost “pure” 2 s1/2 single-neutron halo ground state configuration. At collision energies around Coulomb barrier reaction dynamics expected to be dominated by single transfer and breakup. To investigate these effects, we have measured scattering with a 208 Pb target at 65 MeV HIE-ISOLDE facility in CERN (Geneva, Switzerland). preliminary data demonstrates presence strong long-range absorption pattern angular...
In past experiments, mass asymmetric projectile-target combinations124Sn+64Ni and 112Sn+58Ni were investigated at ELab(112'124Sn)=35 A.MeVbeam energybyusing the 4n multi-detector CHIMERA. From a quantitative comparison of cross sections associated to Statistical Dynamical Fission Projectile-Like Fragments, it resulted that process is about two times more probable in neutron rich 124Sn+64Ni system than 112 Sn +58 Ni poor one. contrast, no sizable difference was found for mechanism. The...
We present the current status of nuclear dynamics studies performed by BREAKUP group with 4π CHIMERA array, for system 197Au + at 23 AMeV.