Conveners
Poster Session - NUC
- Alinka Lepine-Szily (University of São Paulo, Brazil)
- Leandro Gasques (University of São Paulo, Brazil)
The estimation of spectrosopic properties of neutron-deficient nuclei in the A=100 tin mass region is needed for the understanding of the rp-process path and the experimental exploration of the nuclear landscape. In order to evaluate some spectroscopic properties of the Gamow-Teller $\beta^+$ decay of neutron deficient tin isotopes of A=100, we have performed shell model calculations by means...
Nowadays, much attention has been given to the problem of obtaining accurate numerical solutions of fixed source discrete ordinates problems. In this work, we described and tested four different numerical methods to solve one-group unidimensional discrete ordinates problems. First, we derived the Diamond Difference (DD) method, next it´s implemented the Linear Discontinuous (LD) and Spectral...
The production of heavy clusters in nuclear reactions is a mechanism that until now is not well understood despite its importance and its wide variety of applications: radiation protection, space and engineering design, medical physics, the design of accelerators and others. According to the Exciton Cascade Model (CEM), there are three possible ways of producing high energy heavy clusters. The...
An extension to the Monte Carlo assisted Classical Method (MCCM) methodology was developed and implemented. The extension allows to calculate the atom displacement per atom (dpa) profiles considering threshold displacement energies which are spatially inhomogeneous. Calculation of the dpa profiles was performed using both, the standard methodology and extended one for gammas of 1.25, 3, 7 and...
The production of neutron-rich heavy elements takes place via the rapid neutron capture process (r-process). To favour neutron captures over beta decays the astrophysical environment should be explosive like the one found in the core-collapse supernovae. In this work, we focus on the High Entropy Winds (HEW) in Type II supernovae which are one of the more promising sites for the r-process....
In this work, the cross sections of the nuclear reactions $^{13}$C(n, γ)$^{14}$C and $^{14}$N(n, p)$^{14}$C are experimentally measured using the accelerators mass spectrometry (AMS) technique. To carry out this experiment we use the thermal neutron flux produced by the TRIGA Mark III nuclear reactor located at the National Institute of Nuclear Research (ININ) in Mexico. The concentration of...
Under progressive and intensive radiation damage conditions atom displacement threshold energy, $T_d$, calculations through Molecular Dynamic Methods must take into the account, in addition to the framework of single recoil atom excitation in an ideal crystalline lattice, multiple excitations and real crystal structures with point defects, in order to reach a better approach to situations...
Present work deals with the scientific problems and the “states of arts” on regard the knowledge of the physical and structural behaviors of composite materials based on superconducting YBa$_2$Cu$_3$O$_7$ (YBCO) and carbon nanostructured compounds (wires and onnions), as well as, their electron and gamma radiation response, which are nominated as YBCO-Nano/C.
Based in the application of...
The purpose of this work was to investigate fission modes in the fission of heavy actinides. The experiments have been carried out at the U400 cyclotron at the FLNR JINR (Dubna, Russia) using the double-arm time-of-flight spectrometer CORSET. To investigate the role of closed proton and neutron shells in fission of $^{248}$Cf, $^{254}$Fm and $^{260}$No nuclei at an excitation energy of 40-45...
In this work, we have realized some spectroscopic calculations in the frame work of the nuclear shell model, in order to estimate the Gamow-teller (GT) $\beta^+$ decay of A=98 proton rich isobars in $^{100}$Sn mass region near rp-process path. The calculations are carried out by means of Oxbash nuclear structure code, taking into account the monopole effect in the studied mass region. The...
Understanding the mechanism of energy loss of charged particles in matter is very important in atomic and nuclear physics given its application in fields such as material and surface science or radiation damage studies. In the last few years, there has been a renewed interest in increasing the accuracy of energy loss and straggling experimental values in order to determine some key parameters...
In recent years, the investigation of spallation reactions have caught the attention of scientific community due to their application in the transmutation of nuclear waste by using the Accelerator Driven System (ADS) reactors. Due to the experimental difficulties that nuclear reactions researches face; the study of spallation reaction by using simulation codes is more suitable for generating...
The study of nuclei out of the line of stability has been one of the main fields of research in low energy nuclear physics [1]. Light exotic nuclei such as 6He, 11Be, 11Li, 8B and others are produced in laboratory [2-4] and present new interesting phenomena such as the Borromean structure and the neutron and proton halos [5]. Nuclei like 7Be [6] and 8Li are not so exotic, however, may have...
Very High Temperature Reactor (VHTR) designs of Generation IV, offer promising performance characteristics; they can provide sustainable energy, improved proliferation resistance, inherent safety, and high temperature heat supply. The 10MW High Temperature Reactor-Test Module (HTR-10) is a pebble bed reactor (PBR). To achieve the commercialization of these reactors in the nuclear industry, it...
An experimental protocol to study the total cross section for the $^{13}$C(d, p)$^{14}$C nuclear reaction via AMS is being developed for energies in the center-of-mass frame between 100 and 533 keV. We started a series of experiments in which two aluminium cathodes filled with natural-graphite (98.9$\%$ 12C, 1.1$\%$ 13C) were irradiated at a deuterium energy of 4 MeV at the 6.0 MeV Tandem...
The Monte Carlo Simulation of Atom Displacement, MCSAD, algorithm and code have been developed and applied in solid materials for the assessment of electron and gamma radiation damage. In the code, single primary knock-on atom (PKA), processes are taken into account in regard to atom displacement (AD) occurrences, which give a well-suited description of radiation damage effects on relative low...
