A5036173460- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Radiation Detection and Scintillator Technologies
- Radiation Therapy and Dosimetry
- Nuclear physics research studies
- Advanced Radiotherapy Techniques
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
- Advanced X-ray and CT Imaging
- Muon and positron interactions and applications
- Atomic and Subatomic Physics Research
- X-ray Spectroscopy and Fluorescence Analysis
- Radiomics and Machine Learning in Medical Imaging
- Radiation Dose and Imaging
- Boron Compounds in Chemistry
- Cancer, Hypoxia, and Metabolism
- Astro and Planetary Science
- Fusion materials and technologies
- Superconducting Materials and Applications
- Chemical Synthesis and Characterization
- Radiopharmaceutical Chemistry and Applications
- Hepatocellular Carcinoma Treatment and Prognosis
- Advanced MRI Techniques and Applications
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
European Organization for Nuclear Research
2011-2020
Istituto Nazionale di Fisica Nucleare
2011-2017
Physikalisch-Technische Bundesanstalt
2011
National Technical University of Athens
2011
Czech Technical University in Prague
2011
University of Basel
2011
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2011
University of Bologna
2011
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2011
National Agency for New Technologies, Energy and Sustainable Economic Development
2011
The conversion of computed tomography (CT) numbers into material composition and mass density data influences the accuracy patient dose calculations in Monte Carlo treatment planning (MCTP). aim our work was to develop a CT scheme by performing stoichiometric calibration. Fourteen dosimetrically equivalent tissue subsets (bins), which ten bone bins, were created. After validating proposed on phantoms, it compared conventional five bin with only one bin. This resulted distributions D 14 5 for...
The neutron sensitivity of the C$_6$D$_6$ detector setup used at n_TOF for capture measurements has been studied by means detailed GEANT4 simulations. A realistic software replica entire experimental hall, including beam line, sample, supports and walls area implemented in simulations have analyzed same manner as data, particular applying Pulse Height Weighting Technique. validated against a measurement background performed with $^\mathrm{nat}$C showing an excellent agreement above 1 keV. At...
This work reports on accurate, high-resolution measurements of the $^{25}$Mg($n, \gamma$)$^{26}$Mg and tot$) cross sections in neutron energy range from thermal to about 300 keV, leading a significantly improved parametrization. The relevant resonances for $n+^{25}$Mg were characterized combined R-matrix analysis experimental data. resulted an unambiguous spin/parity assignment corresponding excited states $^{26}$Mg. With this information upper limits reaction rates $^{22}$Ne($\alpha,...
The $^{58}$Ni $(n,\gamma)$ cross section has been measured at the neutron time of flight facility n_TOF CERN, in energy range from 27 meV up to 400 keV. In total, 51 resonances have analyzed 122 Maxwellian averaged sections (MACS) calculated for stellar temperatures kT$=$5-100 keV with uncertainties less than 6%, showing fair agreement recent experimental and evaluated data kT = 50 MACS extracted present work 30 is 34.2$\pm$0.6$_\mathrm{stat}\pm$1.8$_\mathrm{sys}$ mb, latest results...
The 241Am(n,γ) cross section has been measured at the n_TOF facility CERN using deuterated benzene liquid scintillators, commonly known as C6D6 detectors, and time-of-flight spectrometry. results in resolved resonance range bring new constraints to evaluations below 150 eV, energy upper limit was extended from 320 eV with a total of 172 resonances not present current evaluations. thermal capture found be σth=678±68 b, which is good agreement most previous measurements. unresolved region...
The measurement of the capture cross-section fissile elements, utmost importance for design innovative nuclear reactors and management waste, faces particular difficulties related to $ \gamma$ -ray background generated in competing fission reactions. At CERN neutron time-of-flight facility n_TOF we have combined Total Absorption Calorimeter (TAC) detector with a set three 235U loaded MicroMegas (MGAS) detectors measuring simultaneously two reactions: fission. results presented here include...
The integral cross section of the ${}^{12}\mathrm{C}(n,p){}^{12}\mathrm{B}$ reaction has been determined for first time in neutron energy range from threshold to several GeV at n_TOF facility CERN. measurement relies on activation technique with $\ensuremath{\beta}$ decay ${}^{12}\mathrm{B}$ measured over a period four half-lives within same bunch which occurs. results indicate that model predictions, used variety applications, are mostly inadequate. value reported here can be as benchmark...
The aim of this work is to provide a precise and accurate measurement the $^{238}\mathrm{U}$($n,\ensuremath{\gamma}$) reaction cross section in energy region from 1 eV 700 keV. This fundamental importance for design calculations nuclear reactors, governing behavior reactor core. In particular, fast which are experiencing growing interest their ability burn radioactive waste, operate high neutron spectrum. most recent evaluations disagree due inconsistencies existing measurements up 15%....
The capabilities and physics model implemented inside the FLUKA code are briefly described, with emphasis on hadronic interaction. Examples of performances presented including basic (thin target) complex benchmarks, radiation detector specific applications. In particular ability in describing existing calorimeter predicting those future ones, as well use for neutron mixed field detectors will be demonstrated several examples.
A software solution has been developed to carry out Monte Carlo simulations of portal dosimetry using the BEAMnrc/DOSXYZnrc code at oblique gantry angles. The is based on an integrated phantom, whereby effect incident beam obliquity was included geometric transformations. Geometric transformations are accurate within ±1 mm and ±1° with respect exact values calculated trigonometry. An application in image prediction inhomogeneous phantom demonstrated good agreement measured data, where...
The $^{33}\mathrm{S}(n,\ensuremath{\alpha})^{30}\mathrm{Si}$ cross section has been measured at the neutron time-of-flight ($\mathrm{n}_\mathrm{TOF}$) facility CERN in energy range from 10 to 300 keV relative $^{10}\mathrm{B}(n,\ensuremath{\alpha})^{7}\mathrm{Li}$ cross-section standard. Both reactions were simultaneously with a set of micromegas detectors. flight path 185 m allowed us obtain high-energy resolution. An accurate description resonances performed by means multilevel...
The 241Am(n,γ) cross section has been measured at the n_TOF facility CERN with BaF2 Total Absorption Calorimeter in energy range between 0.2 eV and 10 keV. Our results are analyzed as resolved resonances up to 700 eV, allowing a more detailed description of than current evaluations, which contain only 150–160 eV. unresolved resonance region is perfectly consistent predictions based on average parameters deduced from resonances, thus obtaining full neutron under study. Below 20 our reasonable...
The response of electronic portal imaging devices (EPIDs) the scanning liquid ionization chamber (SLIC) type is known to vary with linear accelerator gantry angle. This work considered several contributing factors, quantified artefacts, monitored their reproducibility and investigated effects repeated rotations. Unflatness up 5% was found. A correction technique devised using nonlinear regression a three-variable sinusoidal modulation. Comparison two existing techniques found our method be...
The radiative capture cross section of a highly pure (99.999%), 6.125(2) grams and 9.56(5)$\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ atoms/barn areal density $^{238}\mathrm{U}$ sample has been measured with the Total Absorption Calorimeter (TAC) in 185 m flight path at CERN neutron time-of-flight facility n_TOF. This measurement is response to NEA High Priority Request list, which demands an accuracy this less than 3% below 25 keV. These data have undergone careful background...
The accuracy on neutron capture cross section of fissile isotopes must be improved for the design future nuclear systems such as Gen-IV reactors and Accelerator Driven Systems. High Priority Request List Nuclear Energy Agency, which lists most important data requirements, includes also sections 233,235U 239,241Pu. A specific experimental setup has been used at CERN n_TOF facility measurement 235U by a set micromegas fission detectors placed inside segmented BaF2 Total Absorption Calorimeter.