N. H. Medina
A5014016978- Nuclear physics research studies
- Nuclear Physics and Applications
- Radiation Effects in Electronics
- Atomic and Molecular Physics
- Neutrino Physics Research
- Advanced NMR Techniques and Applications
- Advanced Chemical Physics Studies
- Quantum Chromodynamics and Particle Interactions
- Astronomical and nuclear sciences
- Particle accelerators and beam dynamics
- VLSI and Analog Circuit Testing
- Nuclear reactor physics and engineering
- Semiconductor materials and devices
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Graphite, nuclear technology, radiation studies
- Radioactivity and Radon Measurements
- Integrated Circuits and Semiconductor Failure Analysis
- Particle physics theoretical and experimental studies
- Advancements in Semiconductor Devices and Circuit Design
- Quantum, superfluid, helium dynamics
- Radiation Detection and Scintillator Technologies
- Electrostatic Discharge in Electronics
- Ion-surface interactions and analysis
Universidade de São Paulo
2016-2025
Hospital Universitário da Universidade de São Paulo
2016-2024
National Nuclear Energy Commission
2011-2024
Instituto de Pesquisas Energéticas e Nucleares
2011-2024
Campbell Collaboration
2020-2023
University of Lusaka
2021
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2017-2020
Istituto Nazionale di Fisica Nucleare
2020
Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2020
Universidade Cidade de São Paulo
2017-2018
Background: Single-charge-exchange reactions are appropriate tools to study the nuclear response one-particle/one-hole isospin probes, gaining additional interest from connection beta decay. This analogy has been recently extended second order, connecting double-charge-exchange and double decays. Nowadays, availability of powerful experimental setups advanced theories models allows one access precious information on key structure aspects embedded in widely sought neutrinoless decay.Purpose:...
Background: In recent years, the NUMEN project has highlighted that systematic study of double charge exchange (DCE) nuclear reactions could provide precious information on matrix elements neutrinoless $\ensuremath{\beta}$ decay. To achieve this goal, a multichannel approach was adopted, where plethora different reaction channels is measured under same experimental conditions and analyzed in coherent framework. context, initial (ISI) final (FSI) state interactions are fundamental building...
Background: A systematic exploration of one-nucleon transfer reactions induced by the ($^{18}\mathrm{O},^{19}\mathrm{F}$) and ($^{18}\mathrm{O},^{17}\mathrm{O}$) on different targets ($^{12}\mathrm{C}, ^{16}\mathrm{O}, ^{27}\mathrm{Al}, ^{40}\mathrm{Ca}, ^{48}\mathrm{Ti}, ^{76}\mathrm{Se}, ^{116}\mathrm{Sn}$) is being performed at Istituto Nazionale di Fisica Nucleare--Laboratori Nazionali del Sud (INFN-LNS) beam energies higher than Coulomb barrier. featured aspect adoption a multichannel...
Background: Heavy-ion induced two-nucleon transfer reactions are powerful tools to reveal peculiar aspects of the atomic nucleus, such as pairing correlations, single-particle and collective degrees freedom, more. Also, these processes in competition with direct meson exchange double charge reactions, which have recently attracted great interest due their possible connection neutrinoless double-\ensuremath{\beta} decay. In this framework, exploration $^{20}\mathrm{Ne}+^{116}\mathrm{Cd}$...
The 40 Ca( 18 O, F) K single charge exchange (SCE) reaction is explored at an incident energy of 275 MeV and analyzed consistently by collecting the elastic scattering inelastic data under same experimental conditions. Full quantum-mechanical SCE calculations direct mechanism are performed including microscopic nuclear structure inputs adopting either a bare optical potential or coupled channel equivalent polarization (CCEP) constrained data. describes magnitude shape angular distributions...
Single-nucleon transfer reactions are processes that selectively probe single-particle components of the populated many-body nuclear states. In this context, recent efforts have been made to build a unified description rich spectroscopy accessible in heavy-ion collisions. An example multichannel approach is study competition between successive nucleon and charge exchange reactions, latter being particular interest context single double beta decay studies. To extent, one-proton pickup...
Double charge exchange (DCE) reactions could provide experimentally driven information about nuclear matrix elements of interest in the context neutrinoless double-β decay. To achieve this goal, a detailed description reaction mechanism is mandatory. This requires full characterization initial and final-state interactions, which are poorly known for many projectile-target systems involved future DCE studies. Among these, we intend to study 20Ne + 130Te 18O 116Sn at 15.3 AMeV, particularly...
NUMEN proposes an innovative technique to access the nuclear matrix elements entering expression of lifetime double beta decay by cross-section measurements heavy-ion induced Double Charge Exchange (DCE) reactions. Despite fact that two processes, namely neutrinoless and DCE reactions, are triggered weak strong interaction respectively, important analogies suggested. The basic point is coincidence initial final state many-body wave functions in types processes formal similarity transition...
Purpose: We want to analyze transitions low-lying excited states of the residual and ejectile nuclei in 76Se(18O, 17O) 77Se one-neutron stripping reaction at 275-MeV incident energy determine role single-particle core excitation description measured cross sections. In addition, we explore sensitivity calculated section different nuclear structure models. Methods: The spectrum differential cross-section angular distributions are using MAGNEX large acceptance magnetic spectrometer for...
The vulnerability of prominent silicon-based U-shaped Metal-Oxide-Semiconductor Field Effect Transistors (UMOSFET) to destructive radiation effects when operating in terrestrial atmospheric environments is addressed. It known that secondary particles from nuclear reactions between neutrons and the constituent materials electronic devices can trigger Single-Event Burnout (SEB) failure power MOSFETs. susceptibility UMOSFETs SEBs induced by accelerated tests are compared similarly rated...
The recent advance of silicon technology has allowed the integration complex systems in a single chip. Nowadays, Field Programmable Gate Array (FPGA) devices are composed not only programmable fabric but also by hard-core processors, dedicated processing block interfaces to various peripherals, on-chip bus structures and analog blocks. Among latest released this type, work focuses 28 nm Xilinx Zynq-7000 All SoC (APSoC). While immune radiation environment space, seems be very attractive for...
This paper presents a dual-core lockstep (DCLS) implementation to protect hard-core processors against radiation-induced soft errors. The proposed DCLS is applied an Advanced RISC Machine Cortex-A9 embedded processor. Different software optimizations were evaluated assess their impact on performance and fault tolerance. Heavy ions' experiments injection emulation performed analyze the system susceptibility errors performance. Results show that approach able decrease cross section achieve...
This article evaluates the RISC-V Rocket processor embedded in a Commercial Off-The-Shelf (COTS) SRAM-based field-programmable gate array (FPGA) under heavy-ions-induced faults and emulation fault injection. We also analyze efficiency of using mitigation techniques based on hardware redundancy scrubbing. Results demonstrated an improvement 3× cross section when scrubbing coarse grain triple modular are used. The presented analogous sensitivity to radiation effects as state-of-the-art soft...
Neutrinos are so far the most elusive known particles, and in last decades many sophisticated experiments have been set up order to clarify several questions about their intrinsic nature, particular masses, mass hierarchy, nature of Majorana or Dirac particles. Evidence Neutrinoless Double-Beta Decay (NDBD) would prove that neutrinos thus improving understanding universe itself. Besides search for large underground direct experimental detection NDBD, NUMEN experiment proposes investigation a...
The $^{105}\mathrm{Rh}$ nucleus has been studied with the $^{100}\mathrm{Mo}(^{11}\mathrm{B},\ensuremath{\alpha}2n\ensuremath{\gamma})$ reaction at $43\phantom{\rule{0.3em}{0ex}}\text{MeV}$ incident energy. A rich variety of structures was observed high and low spins, using $\ensuremath{\gamma}\text{\ensuremath{-}}\ensuremath{\gamma}\text{\ensuremath{-}}t$ $\ensuremath{\gamma}\text{\ensuremath{-}}\ensuremath{\gamma}\text{\ensuremath{-}}\mathit{particle}$ coincidences directional correlation...
The low- and medium-spin states of the $N=50$ neutron-rich, $_{37}^{87}\mathrm{Rb}$, $_{35}^{85}\mathrm{Br}$, $_{34}^{84}\mathrm{Se}$ $_{32}^{82}\mathrm{Ge}$ isotones have been populated in deep-inelastic processes produced by interaction $460\phantom{\rule{0.3em}{0ex}}\mathrm{MeV}$ $^{82}\mathrm{Se}$ ions with a $^{192}\mathrm{Os}$ target. subsequent $\ensuremath{\gamma}$ decay has investigated at Laboratori Nazionali di Legnaro using GASP $\ensuremath{\gamma}$-ray detector array....
This work proposes a novel methodology to evaluate SRAM-based FPGA's susceptibility with respect Single-Event Upset (SEU) as function of noise on VDD power pins, TotalIonizing Dose (TID) and TID-imprinted effect BlockRAM cells. The proposed procedure is demonstrated for SEU measurements Xilinx Spartan 3E FPGA operating in an 8 MV Pelletron accelerator the test heavy-ions, whereas TID was deposited by means Shimadzu XRD-7000 X-ray diffractometer. In order observe TID-induced imprint inside...
The $^{10}\mathrm{B}+^{120}\mathrm{Sn}$ reaction has been investigated at ${E}_{\mathrm{Lab}}=37.5$ MeV. cross sections for different channels, such as the elastic scattering, excitation of ${2}^{+}$ and ${3}^{\ensuremath{-}}\phantom{\rule{4pt}{0ex}}^{120}\mathrm{Sn}$ states, ${1}^{+}$ state $^{10}\mathrm{B}$, $1n$ pick-up transfer, have measured. One-step distorted-wave Born approximation coupled-reaction-channels calculations performed in context double-folding S\~ao Paulo potential....