A5064624810- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- X-ray Spectroscopy and Fluorescence Analysis
- Dark Matter and Cosmic Phenomena
- Nuclear reactor physics and engineering
- Quantum Chromodynamics and Particle Interactions
- Ion-surface interactions and analysis
- Particle Detector Development and Performance
- Advanced Chemical Physics Studies
- Nuclear Materials and Properties
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Graphite, nuclear technology, radiation studies
- Particle physics theoretical and experimental studies
- Particle accelerators and beam dynamics
- Rare-earth and actinide compounds
- Radioactive contamination and transfer
- Medical Imaging Techniques and Applications
- Radioactivity and Radon Measurements
- Radiopharmaceutical Chemistry and Applications
- Fusion materials and technologies
- Cold Fusion and Nuclear Reactions
- Scientific Research and Discoveries
Comisión Nacional de Energía Atómica
2010-2024
National University of General San Martín
2007-2023
International Atomic Energy Agency
2009-2014
National Technical University of Athens
2011
Consejo Nacional de Investigaciones Científicas y Técnicas
2010
Brookhaven National Laboratory
2006-2008
Centro Atómico Constituyentes
2007
State University of New York
1981-2005
Universidade Federal Fluminense
2003
Universidade de São Paulo
2003
Results are reported of an experimental search for the unique, rapidly varying temporal pattern solar axions coherently converting into photons via Primakoff effect in a single crystal germanium detector when incident at Bragg angle with crystalline plane. The analysis 1.94 kg yr data from 1 DEMOS Sierra Grande, Argentina, yields new laboratory bound by axion-photon coupling...
To study the conditions leading to appearance of threshold anomaly in systems involving weakly bound projectiles we measured elastic scattering cross sections for $^{7}\mathrm{Li}+^{27}\mathrm{Al}$ system at ten different bombarding energies. The results were exhaustively analyzed using optical model potentials. similar behavior observed all these analyses allows us conclude that no is found present system.
Elastic scattering of the weakly bound $^{6}\mathrm{Li}$ on $^{27}\mathrm{Al}$ was measured at near-barrier energies. The data analysis performed using a Woods-Saxon shape optical potential and also double-folding S\~ao Paulo potential. results show presence breakup threshold anomaly (BTA), an anomalous behavior when compared with tightly nuclei. This is attributed to repulsive polarization produced by coupling continuum states.
Elastic scattering of the weakly bound $^{9}\mathrm{Be}$ on $^{27}\mathrm{Al}$ was measured at near barrier energies. The optical model data analysis with real and imaginary parts a global double-folding potential does not show strong evidence usual threshold anomaly. same result obtained by using Woods-Saxon shape calculating strengths absorption radius. reason for this behavior may be explained presence break-up and∕or transfer channels low
Fusion cross sections were measured for the ${}^{6,7}\mathrm{Li}{+}^{27}\mathrm{Al},$ ${}^{64}\mathrm{Zn}$ systems, at energies above Coulomb barrier, in order to study influence of breakup stable weakly bound nuclei on fusion process. The analysis was completed by inclusion data induced ${}^{9}\mathrm{Be}$ and strongly ${}^{16}\mathrm{O}$ ${}^{11}\mathrm{B}$ projectiles same targets. excitation functions have similar behavior all incident both targets they show no indication hindrance.
Fusion cross sections were measured for the 9Be+27Al and 19F+9Be, 12C systems, at energies above Coulomb barrier, in order to investigate possible effect of fusion hindrance due break-up weakly bound nuclei. Comparisons with one-dimensional barrier penetration models other similar where no is expected occur, show evidence hindrance.
Fusion-evaporation cross sections for the $^{32}\mathrm{S}$${+}^{154}$Sm system at bombarding energies near Coulomb barrier have been measured by off-line observation of K x rays emitted in radioactive decay residual nuclei. The total fusion were obtained adding contributions from evaporation and fission processes. excitation function this is compared with coupled-channel calculations that include deformation target vibrational states both projectile.
Fusion cross sections have been measured for $^{16}$O${+}^{147}$,149Sm at bombarding energies in the range 61 MeV \ensuremath{\le}${E}_{\mathrm{lab}{(}^{16}\mathrm{O})\mathit{\ensuremath{\le}}75}$ by off-line observation of x rays emitted radioactive decay Yb isotopes and their daughters. The fusion excitation functions are similar to those adjacent even Sm isotopes. It appears, therefore, that odd valence neutrons do not any unusual influence on subbarrier enhancement...
We have measured the fusion excitation function and \ensuremath{\gamma}-ray multiplicities ${\mathit{M}}_{\ensuremath{\gamma}}$ for $^{28}\mathrm{Si}$${+}^{154}$Sm system. also $^{16}\mathrm{O}$${+}^{166}$Er system that leads to same compound nucleus, $^{182}\mathrm{Os}$, as a calibration of connection between first moment spin distribution, 〈l〉. find deduced 〈l〉 agrees reasonably well with theoretical calculations, in particular its energy dependence exhibits barrier bump expected when...
Cross sections for elastic and inelastic scattering of the weakly-bound $^9$Be nucleus on a $^{120}$Sn target have been measured at seven bombarding energies around above Coulomb barrier. The angular distributions are analyzed with four-body continuum-discretized coupled-channels (CDCC) calculation, which considers as three-body projectile ($\alpha$ + $\alpha$ n). An optical model analysis using S\~ao Paulo potential is also shown comparison. CDCC shows that coupling to continuum part...
The probability ${P}_{n}$ of emitting a neutron following $\ensuremath{\beta}$ decay is critical in many areas nuclear science, from understanding nucleosynethesis during the $r$ process to control reactor power levels and waste management. As it not always easy measure or calculate, indirect empirical approaches have been developed estimate value ${Q}_{\ensuremath{\beta}}$ separation energy S${}_{n}$. Here, we present new prescription incorporating also half-life ${T}_{1/2}$, which...
Rotational bands in the odd-odd nucleus $^{180}\mathrm{Re}$ have been studied via $^{176}\mathrm{Yb}$${(}^{10}$B,6n) and $^{181}\mathrm{Ta}$(\ensuremath{\alpha},5n) fusion-evaporation reactions. A completely new high-spin level scheme has obtained comprising four \ensuremath{\Delta}I=1 a \ensuremath{\Delta}I=2 band. The structures can be understood from quasiparticle states neighboring odd nuclei band is interpreted as example of double decoupled sequence based on ${h}_{9/2}$ proton...
Angular distributions for elastic and inelastic scattering of $^{16}$O${+}^{144}$Sm have been measured at bombarding energies E=69.2 72.3 MeV. Excitation functions were between E=61 76.3 MeV backward angles. The present data plus existing fusion adjusted with both energy-independent energy-dependent optical-model potentials. energy dependence appears to be consistent the dispersion relations which correlate real imaginary components potentials behave similarly when coupling channels is considered.