Nuclear Reactions

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FOSTERING EXCELLENCE IN
RESEARCH AND INNOVATION

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FOSTERING EXCELLENCE IN
RESEARCH AND INNOVATION

NUCLEAR ENGINEERING
AND TECHNIQUES GROUP

RESEARCH ACHIEVEMENTS

RESEARCH ACHIEVEMENTS

NUCLEAR REACTIONS

Knockout-reactions might constitute a sensitive tool to investigate the single particle or cluster structure of nuclei. The first theoretical calculations for kinematic fully exclusive observables for nucleon (N) knockout for light nuclei have been performed. It is shown that cross section can be accurate tools of structure information if one single out some suitable energy regime and some specific kinematic regions for the outgoing fragments.

ETN 9

For the R3B collaboration theoretical kinematic fully exclusive cross sections for nucleon knockout were evaluated, as an input to a realistic event generator developed within the R3B collaboration of NUSTAR/FAIR in order to obtain the efficiency for detecting two protons or a proton and a neutron over a threshold at the Crystall Ball detector and correct the resolution for nucleon knockout. This event generator can be made part of the R3BRoot framework developed for simulations and data analysis of the new R3B setup that will be installed at FAIR.

ETN 10

DEVELOPMENT OF A COMPUTATIONALLY EFFICIENT DYNAMICAL MODEL OF CONSTRAINED FLEXIBLE SYSTEMS USING A MODAL UDWADIA-KALABA FORMULATION

Most structures consist on dynamical subsystems connected at constraining points. While standard modelling techniques use Lagrange multipliers or penalty methods, Udwadia & Kalaba (U-K) encapsulated the constraints ...

DOSE ASSESSMENTS IN MEDICAL APPLICATIONS

As far as mammography is concerned, one relevant work we developed characterizes the practice at 65 mammography units and the other presents dose reference levels measured with TLD and direct readings later compared with European ...

FOSTERING A LOW CARBON-ECONOMY IN SCHOOLS

The EU Roadmap 2050 suggests that, by 2050, the EU should cut its greenhouse gas emissions to 80% below 1990 levels. In this framework NET is coordinating the project Interreg Sudoe ClimACT (www.climact.net) that aims to promote the transition to a Low Carbon-Economy ...

CHEMICAL ELEMENT ACCUMULATION IN TREE BARK GROWN IN VOLCANIC SOILS

The semi-arid Cape Verde archipelago has incipient soils with high potential of imbalance of chemical elements due to diverse magmatic events. Nevertheless these volcanic soils are a valuable resource of these islands for agriculture. So the eventual impact ...

DEVELOPMENT OF SOFTWARE FOR X-RAY ANALYTICAL METHODS AND QUANTITATIVE INSTRUMENTAL SPECIATION METHODS FOR PARTICLE INDUCED X-RAYS EMISSION (PIXE)

L3 yields of Yb measured during Oxygen beam irradiations showed differences between O²⁺ and O³⁺ beam irradiations, for the same energy, after taking into account the collecting charge for each single spectrum, corrected to the ion charge ...

ION BEAM TECHNIQUES

All general purpose codes for analysis of Ion Beam Analysis data have been originally developed to handle laterally homogeneous samples only, with only limited support for ...

DOSIMETRY OF BORON-LOADED CELLS IRRADIATED WITH THERMAL NEUTRONS
In collaboration with the Radiopharmaceutical Sciences and Radiation Protection and Safety groups, novel agents for Boron Neutron Capture Therapy (BNCT) were evaluated following the irradiation of glioma cells at the Portuguese ...

LUMINESCENCE DATING OF CULTURAL HERITAGE CERAMIC SAMPLES: INNOVATIVE APPROACHES IN DATA TREATMENT
Luminescence measurements in small sampling using micro-invasive methodologies to study cultural heritage are a challenge due to the very low ...

INAA APPLICATION IN VOLCANIC TOPSOILS OF BRAVA ISLAND (CAPE VERDE) - GEOCHEMICAL FINGERPRINTS IDENTIFICATION

Volcanic topsoils developed on Brava Island collected before the 2014–2015 eruption in the neighboring Fogo Island, show significant chemical ...

DYNAMICAL CHARACTERIZATION AND TUNING OF BELLS
This work started with the analysis of the tuning condition of the Mafra carillons bells, which form the largest surviving 18th century carillons in Europe. It is part of a multidisciplinary FCT research project ...

IMPROVEMENT OF THE CTF PRACTICE: DOSE REDUCTION
Study and identification of the necessary technical parameters of radiological examinations: (a) Mammography; (b) Fluoroscopy in Computed Tomography or fluoro-CT guided procedures (CTF); ...

X-RAY AND NEUTRON-BASED NON-INVASIVE ANALYSIS OF STONE ARTEFACTS AS A CONTRIBUTION TO UNDERSTAND MOBILITY AND INTERACTION NETWORKS IN PRE-HISTORY OF SOUTHERN IBERIAN PENINSULA

Stone idols and vases from Perdigões Chalcolithic site (Portugal) were analysed. The investigation had interdisciplinary character based on physical-chemical and archaeological knowledge. These carbonate-rich ...

CHARACTERISATION OF AD-ATOMS AND AD-MOLECULES ON GRAPHENE

Achieving n-, p-type stable doping of graphene is being investigated for different metal dopants, particularly for Hg single atoms and the (easily made) stable linear HgO₂ molecule. Several configurations of freestanding Hg and HgO₂ molecules ...

NUCLEAR HYPERFINE INTERACTIONS ON HG HALIDES

Where early experiments (Berkeley, Bonn) in the 1970s had failed, we have successfully made the first Perturbed Angular Correlations, PAC, nuclear hyperfine interactions experiments on the 5/2+ ¹⁹⁷Hg state in free Hg-halide molecules ...

DETAILED STUDIES OF AMPHOTERIC MG-DOPANT IN GAN

Mg-doped p-type GaN is a core component of solid state white lighting or blue lasers optoelectronic devices. Despite the technological maturity of GaN, there is an inherent doping limit since above a certain concentration of substitutional ...

SUPERHEATED LIQUID DETECTORS

The superheated liquid detectors developed by our group were upgraded for the IV^th phase of the SIMPLE dark matter search, and exploited towards novel applications in alpha particle detection. Developments of the SIMPLE bubble chamber aiming at ...

PROOF OF AMPHOTERIC MG-DOPANT IN GaN

The emission channeling technique with short-lived isotopes (EC-SLI) gives direct information on the lattice location of radioactive isotopes implanted into single crystals. During 2016 ...

THE CHARGE STATE OF Cd DOPANT ON Ga₂O₃

Perturbed Angular Correlations allows probing the electronic distribution in the surroundings of a probe atom and determine its position and electronic configuration ...

TOOLS AND MEASURES TO IMPROVE AIR QUALITY AND TO ACCELERATE THE TRANSITION TO A LOW-CARBON ECONOMY

NET group is working in the development of tools and measures to improve air quality and to accelerate the transition to low-carbon emissions in several ...

OBSERVATION OF STRONG EFFECTS OF ELECTRIC CHARGE STATE UPON INNER-SHELL TRANSITIONS IN INSULATOR REE OXIDES

Overlap of the spectra from two irradiations of Yb2O3 using a beam of protons of 1.1 MeV. The charged-up condition ...

NUCLEAR REACTIONS

Knockout-reactions might constitute a sensitive tool to investigate the single particle or cluster structure of nuclei. The first theoretical calculations for kinematic fully exclusive observables for ...