- Nuclear physics research studies
- Nuclear reactor physics and engineering
- High-Energy Particle Collisions Research
- Nuclear Physics and Applications
- Statistical Mechanics and Entropy
- Particle physics theoretical and experimental studies
- Nuclear Materials and Properties
- Neutrino Physics Research
- Complex Systems and Time Series Analysis
- Quantum Chromodynamics and Particle Interactions
- Cosmology and Gravitation Theories
- Complex Network Analysis Techniques
- Astronomical and nuclear sciences
- COVID-19 epidemiological studies
- Muon and positron interactions and applications
- Theoretical and Computational Physics
- Advanced Chemical Physics Studies
- Scientific Research and Discoveries
- Graphite, nuclear technology, radiation studies
- Advanced Thermodynamics and Statistical Mechanics
Universidade Estadual de Santa Cruz
2009-2023
Universidade de São Paulo
2009-2022
Texas A&M University – Commerce
2015
Centro Brasileiro de Pesquisas Físicas
2009
The predictions from a nonextensive self-consistent theory recently proposed are investigated. Transverse momentum (${p}_{T}$) distribution for several hadrons obtained in $p+p$ collisions analyzed to verify if there is evidence limiting effective temperature and entropic index. In addition, the hadron-mass spectrum that confronted with available data. It turns out all ${p}_{T}$ distributions mass good agreement experiment constant results confirm statistics plays an important role...
In this work we present an analysis of the yields fission fragments induced by bremsstrahlung photons with endpoint energies 50 and 3500 MeV on ${}^{232}$Th ${}^{238}$U targets using simulation code crisp. A multimodal option was added to extension calculation properties products is presented. By dividing fissioning nuclei according their fissionability, approach introduced which accounts for contribution symmetric asymmetric fission. adopting procedure, it possible calculate main parameters...
In this work, we present a bag-type model within nonextensive statistics applied to the description of properties hadronic system with an underlying fractal structure. The ideal gas inside bag is determined by grand canonical partition function from which pressure, energy, and particle density, as well temperature chemical potential are obtained for system. These quantities studied in approximation fixed mass all constituents but also discrete continuum masses. cases, freeze-out line,...
In this work we present the results for investigation of intermediate-mass fragment (IMF) production with proton-induced reaction at 660 MeV on ${}^{238}$U and ${}^{237}$Np target. The data were obtained LNR Phasotron U-400M Cyclotron Joint Institute Nuclear Research (JINR), Dubna, Russia. A total 93 isotopes, in mass range $30<A<200$, unambiguously identified high precision. cross sections by means induced-activation method an off-line analysis. Mass-yield distributions derived from...
Recent experiments have shown that the multimode approach for describing fission process is compatible with observed results. A systematic analysis of parameters obtained by fitting fission-fragment mass distribution to spontaneous and low-energy data has values those present a smooth dependence upon nuclear number. In this work, new methodology introduced studying fragment distributions through approach. It induced energetic probes (E > 30 MeV) fissioning nuclei produced during intranuclear...
Intermediate energy data of proton-induced fission on 241Am, 238U and 237Np targets were analysed investigated using the computational simulation code CRISP. Inelastic interactions protons heavy nuclei both symmetric asymmetric are regarded. The probabilities obtained from CRISP calculations by means Bohr-Wheeler model. cross sections, fissility number nucleons evaporated nuclei, before after fission, calculated compared with experimental data. Some model predictions agree completely We...
Scale-free networks constitute a fast-developing field that has already provided us with important tools to understand natural and social phenomena. From biological systems environmental modifications, from quantum fields high energy collisions, or the number of contacts one person has, on average, flux vehicles in streets urban centres, all these complex, non-linear problems are better understood under light scale-free network’s properties. A few mechanisms have been found explain emergence...
We study the applications of nonextensive Tsallis statistics to high energy and hadron physics. These include studies [Formula: see text] collisions, equation state QCD, as well Bose–Einstein condensation. also analyze connections with thermofractals, address some conceptual aspects fractal approach, which are expressed in terms renormalization group self-energy corrections parton mass. associate these well-known concepts origins structure quantum field theory.
We study the effects of fissioning nuclei mass- and energy-distributions on formation fragments for fission induced by high energy probes. A Monte Carlo code called CRISP was used obtaining mass distributions spectra reactions 660 MeV protons 241Am 239Np, 500 208Pb, Bremsstrahlung photons with end-point energies at 50 3500 238U. The results show that even excitation energies, asymmetric may still contribute significantly to cross section actinide nuclei, while it is dominante mode in case...
A detailed description of photofission process at intermediate energies (200 to 1000 MeV) is presented. The study the reaction performed by a Monte Carlo method which allows investigation properties residual nuclei and fissioning nuclei. information obtained indicate that multifragmentation negligible photon studied here, symmetrical fission dominant. Energy mass distributions were calculated.
We present calculations for the incoherent photoproduction of $J/\ensuremath{\psi}$ vector mesons in ultraperipheral heavy ion collisions (UPCs) terms hadronic interactions. This study was carried out using recently developed Monte Carlo model CRISP extended to include UPCs at energies available CERN Large Hadron Collider. A careful rescattering and destruction particles is presented Pb + $\sqrt{{s}_{NN}}=2.76$ TeV. have also compared our method Au $\sqrt{{s}_{NN}}=200$ GeV measured BNL...
The systematic analysis of several measured fragment mass distributions from different fission reactions available in the literature is presented. Data proton-induced on , 237Np and 238U at 26.5, 62.9 660 MeV, 232Th 190 208Pb 190, 500 1000 MeV 197Au for 800 protons has been analyzed studied framework Random Neck Rupture Model. New data distribution fragments 241Am LNR Phasotron (JINR) are also roles neutron excess so called fissility parameter were investigated.
The fragments produced in nuclear reactions for accelarator driven systems (ADS) operation form elements that can have effects on the structure of reactor. In this regard, calculation fragment distributions gives important information development ADS. To obtain those distributions, Monte Carlo (MC) method is an tool, and work we describe calculations through a MC code initiated by intermediate- high-energy protons photons actinide preactinide nuclei. We study production spallation fission...
Nuclear reactions induced by muon neutrinos with energies from 0.2 to 1.5 GeV in the Monte Carlo calculation framework intranuclear cascade model are studied. This study was done comparing available experimental data and theoretical values of total cross section, energy distribution emitted lepton reaction neutrino nucleus, using targets $^{12}\mathrm{C}, ^{16}\mathrm{O}, ^{27}\mathrm{Al}, ^{40}\mathrm{Ar}, ^{56}\mathrm{Fe}$, $^{208}\mathrm{Pb}$. A phenomenological primary neutrino-nucleon...
We present an analysis of fission induced by intermediate energy protons or photons on actinides. The 660 MeV proton reactions are 241Am, 238U, and 237Np targets the Bremmstrahlung-photons with end-point energies at 50 3500 232Th 238U targets. study was performed means Monte Carlo simulation code CRISP. A multimodal extension added to within approach which accounts for contribution symmetric asymmetric fission. This procedure allowed investigation cross sections, fissility, number evaporated...
We used the phasotron of Laboratory Nuclear Problems at JINR to irradiate isotopically pure $^{209}\mathrm{Bi}$ target with 660 MeV protons. Cross sections fragment production mass numbers $24\ensuremath{\le}A\ensuremath{\le}210$ u were measured for first time using direct $\ensuremath{\gamma}$-spectrometry method a high-resolution HpGe detector. The $\ensuremath{\gamma}$ lines fragments have been identified, and cross determined by deimos code. results nuclide section parametrized in terms...
The neutrino-nucleus reactions are studied at energies from 0 to 3 GeV, using the crisp program. To simulate these reactions, uses Monte Carlo method through an intranuclear cascade model. Quasielastic, baryonic resonance formation, and deep inelastic scattering channels for neutrino-nucleon interaction considered. total differential particle emission cross sections were obtained, resulting in a good agreement with values reported by MiniBooNE experiment. influence of nuclear effects on such...
In this work some aspects of the nonextensive thermodynamics hadronic matter are investigated. particular, an extense analysis fitting procedure distributions transverse momentum several particles is performed focusing on correlation between entropic index and effective temperature. The linear relation τ (q − 1) determined it shown that Hagedorn's temperature can be obtained.
In this work, we present new experimental data on mass distribution of fission fragments from $^{241}$Am proton-induced at $660$ MeV measured the LNR Phasotron (JINR). The systematic analysis several fragment distributions different reactions available in literature is also presented. $^{241}$Am, $^{237}$Np and $^{238}$U 26.5, 62.9 660 was studied. $^{232}$Th studied 190 MeV. $^{208}$Pb by a proton investigated 190, 500 1000 $^{197}$Au for 800 protons. Bremsstrahlung with maximum photon...
Recent experiments have shown that the multimode approach for describing fission process leads to some compatibility with observed results. A systematic analysis of parameters obtained by fitting fission-fragment mass distribution spontaneous and low-energy data has values those present a smooth dependence upon nuclear number. In work it is same parameter-values can be used describe intermediate-energy results fragment-mass distributions if one takes into account appropriate fissioning...