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Dr Daniel Cano Ott (Centro de Investigaciones Energéti cas Medioambientales y Tecno)24/04/2019, 09:20Oral
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Dr Emilio Mendoza (CIEMAT)24/04/2019, 09:30Nuclear reactions at low and intermediate energiesOral
Geant4 allows to use the information available in ENDF-6 format data libraries for the transport of low energy neutrons and charged particles (up to 20 MeV). This is done by the so called G4ParticleHP model (previously G4NeutronHP). We will show the performance of the model, showing its capabilities and limitations. We will also talk about how to use it and about which simulations can be done...
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Vladimir Ivantchenko (CERN)24/04/2019, 10:05Nuclear reactions at low and intermediate energiesOral
High and intermediate energy hadronic models should have a sub-model for simulation of nuclear de-excitation processes. In Geant4 there is a general pre-compound model and a general de-excitation module, which are used by many hadronic models. These models were recently modified and improved. Different aspects of these models are discussed and new validation results are presented.
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Carlo Mancini Terracciano (Sapienza Universita e INFN, Roma I (IT))24/04/2019, 10:40Nuclear reactions at low and intermediate energiesOral
Despite of its large use, the models implemented in Geant4 have shown severe limitations in reproducing the measured secondary yields in ions interaction below 100 MeV/n, in term of production rates, angular and energy distributions.
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For this reason, we coupled BLOB (Boltzmann-Langevin One Body), a models dedicated to simulate such interactions, with Geant4 and its de-excitation phase.
BLOB... -
Prof. Vladimir Grichine (Lebedev Institute of RAS)24/04/2019, 11:40Nuclear reactions at low and intermediate energiesOral
The Glauber-Gribov approach (corrections for both elastic and inelastic nucleon screening) is considered for the description of light nucleus-nucleus cross-sections. It was found that electromagnetic nucleus radii are result in better description of measurements. The calculations are compared with experimental data for the reaction cross-sections
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Dennis Herbert Wright24/04/2019, 12:10Nuclear reactions at low and intermediate energiesOral
Fission in Geant4 is currently simulated as both a separate process and as a de-excitation model in other inelastic processes. Several different models exist, each with different interfaces and functionalities. This has led to confusion about which models are used and what they do, and to the possibility of users double counting fission by incorrect assignment in physics lists. The...
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Prof. Vladimir Ivantchenko (CERN)24/04/2019, 14:00
The status of the Geant4 electromagnetic physics sub-libraries is presented. Current developments of electromagnetic physics is focused on implementation of next to leading terms of various electromagnetic processes including multiple and single scattering, gamma conversion, positron annihilation. Atomic de-excitation module is use in several electromagnetic models and in radioactive decay....
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Dr Christiaan Douma (KVI-CART, University of Groningen)24/04/2019, 14:30
Precise experimental knowledge on a wide variety of observables is a key ingredient for improving our understanding of nuclear structure. As a result, each new generation of accelerator facilities produces larger amounts of data than the previous generation in order to improve the precision of the measurements. Hence, more advanced analysis tools are required to deal with these large amounts...
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Sergey Belogurov (Joint Institute for Nuclear Research (JINR))24/04/2019, 14:50
In order to fully explore the particle identification and measurement capability of the telescopes built from two or more silicon strip detectors, one has to calculate all the dead layers of the detectors as well as the calibration coefficients for each channel. The most reliable way of solving this problem is to combine various measurements with calibration sources and detailed Monte Carlo...
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Viktar Haurylavets (Institut for Nuclear Problems, Belarusian State University)24/04/2019, 15:10
Crystals have an internally ordered structure resulting in anisotropy of electromagnetic interaction of charged particles with crystals. When particles move along crystal axes or planes, they can oscillate in their electric field.
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For ultra-relativistic particles, i.e. ten or hundred GeV electrons and positrons the electric field of axes or planes is comparable to the Schwinger critical field... -
Dr Issam MOUHTI (Ph.D student), Prof. Abdellatif ELANQUE (Professor in Ibn Zohr University)24/04/2019, 15:30
ABSTRACT
The Monte Carlo method is used to calculate the photon detection efficiency of scintillator detectors exposed to gamma rays in the energy range of 59.5 KeV to 1274.54 KeV. This work aims at calculating the response functions for two scintillation detectors CsI(Tl) and LYSO(Ce) (Lu1.9Y0.1SiO5:Ce0.5%) of size 10x10x5 mm3, to gamma-ray sources up to 1274.54 keV. Both detectors were...
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Miguel Antonio Cortes Giraldo (Depto. de Fis. Atom., Mole. y Nucl.-Universidad de Sevilla)24/04/2019, 16:20
Originating from high-energy and nuclear-physics domains, Geant4 is being adopted with increasing interest in the medical physics community, where it continues to gain significant momentum. Of particular interest to the medical physicists is its completeness, with a physics engine that covers the hadronic and nuclear interactions, of particular interest for novel ideas and techniques in the...
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Xiaoning Ding (Mayo Clinic Hospital - Phoenix)24/04/2019, 16:40
Intensity modulated proton therapy (IMPT) is an advanced form of radiation therapy in which the trajectory and energy of a focused beam of protons is precisely controlled so as to irradiate a tumor spot-by-spot and layer-by-layer with proton beamlets [1,2]. While the radiobiological effects of IMPT depend primarily on the physical dose distribution, studies have shown that linear energy...
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Pablo Cirrone24/04/2019, 17:00
The main direction proposed by the community of experts in the field of laser-driven ion acceleration is to improve particle beam features (maximum energy, charge, emittance, divergence, monochromaticity, shot-to-shot stability) in order to demonstrate reliable and compact approaches to be used for multidisciplinary applications, thus, in principle, reducing the overall cost of a laser-based...
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Antonio Damián Domínguez Muñoz (Universidad de Sevilla)24/04/2019, 17:20
Proton beams used in radiotherapy treatments can reach energies up to 250 MeV for deep-seated tumours. However, the existing cross section models included in Geant4-DNA [1,2] cover up to 100 MeV only. The goal of this work is to extend the current applicability range of Geant4-DNA for proton transport in liquid water up to, at least, 250 MeV.
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Due to the energy range considered, the... -
Makoto Asai (SLAC National Accelerator Laboratory (US))25/04/2019, 09:00
In this presentation, we will overview the scoring functionality of Geant4 simulation toolkit that allows users to score various physics quantities such as flux or dose distribution without writing much of C++ code. This functionality is of particular benefit for shielding or radiation protection studies where no particular detector has to be simulated. We will also briefly introduce Geant4’s...
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Marc Verderi (Centre National de la Recherche Scientifique (FR))25/04/2019, 09:40
There is a class of simulation problems for which the events of interest are rare. The shielding problem -with very few particles exiting the shield, where the dose estimates are to be made-, the very thin detector case -with very few particles interacting in it- or the dose estimate in an electronic chip inside a satellite -because of the tiny volume of the chip compared to the large...
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Dr Francesc Salvat (University of Barcelona)25/04/2019, 10:20
Content
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The interaction physics and the transport algorithm of the electron-photon Monte Carlo code system PENELOPE have been introduced as an option in the Geant4 toolkit. PENELOPE implements a strict class II (mixed) algorithm for the simulation of electrons and positrons in matter. The algorithm is defined by cutoff values of the energy loss for inelastic interactions and bremsstrahlung... -
Dragos-Florian Nichita (ELI-NP - IFIN-HH)25/04/2019, 10:50
A rich photo-fission program is proposed at the new Extreme Light Infrastructure - Nuclear Physics (ELI-NP) facility in Magurele-Bucharest, Romania. It is based on the highest brilliance gamma beam system (GBS) that will be available at ELI-NP with energies up to 20 MeV.
In one type of experiments, radioactive ion beams (RIBs), formed from the fission fragments produced by...
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Jean-Christophe David25/04/2019, 11:40Nuclear reactions at low and intermediate energiesOral
INCL (Liège Intranuclear Cascade) is an intranuclear cascade model, a first step for modeling spallation reactions. It is usually combined with the de-excitation code Abla to simulate the entire reaction.
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We will quickly present how this model developed during the last three decades. We will also show how its present high reliability has been achieved, how it has been extended toward the low... -
Thomas Braunroth (Physikalisch-Technische Bundesanstalt (PTB))25/04/2019, 12:10
The Doppler-Shift Attenuation Method (DSAM) and the Recoil-Distance Method (RDM) are
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powerful tools to measure nuclear level lifetimes in the (sub) pico-second range which are used to
determine model-independent transition strengths.
With respect to the common analysis of DSAM experiments, one can distinguish between
analytical approaches and tools using Monte-Carlo methods. The latter... -
Daniel Cano Ott (Centro de Investigaciones Energéti cas Medioambientales y Tecno), Dr Emilio Mendoza (CIEMAT)25/04/2019, 12:30Nuclear reactions at low and intermediate energiesOral
The calculation of the neutrons produced in (alpha,xn) reactions in a certain material require the calculation of the alpha-tracks, the cross sections of the neutron production reactions involved and the energy distributions of the secondary neutron energy distributions.
All these ingredients are present in Geant4, namely the slowing down of the alpha particles (EM physics), the neutron...
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Dr Evan Rand (Canadian Nuclear Laboratories)25/04/2019, 14:20
Understanding and predicting the dynamic behaviour of nuclear reactors is of paramount importance for reactor safety. This time-dependent behaviour is primarily driven by the emission of beta-delayed neutrons and photoneutrons following the decay of neutron-rich fission products. It is the production of these delayed neutrons which allows for a system-dependent “sluggishness” during power...
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Vladimir Grichine (Russian Academy of Sciences (RU))25/04/2019, 14:40
Acceletator driven system (ADS) is simulated by the Geant4 tools - the mass layered geometry and scoring. The ADS target was simulated with different geometries of cooling layers. The neutron output spectra as well as energy deposition profiles are shown. The ADS power (and other parameters) dependence on driver thickness are shown. The medical isotope production is simulated in the batch mode...
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Adriaan Buijs (M)25/04/2019, 15:00
GEANT-4 is well suited for criticality calculations in nuclear reactors, thanks to its ability to track particles, in this case neutrons, in time as well as in space. This sets it apart from traditional Monte Carlo codes such as MCNP, which treat neutrons on a generation-by-generation base. The latter gives inherently incorrect results, in particular for systems that are far from critical. ...
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Mikhail Kozlov (Joint Institute for Nuclear Research (JINR), Bauman Moscow State Technical University)25/04/2019, 15:20
The ExpertRoot framework supports all the stages of the lifecycle of an experiment:
planning and feasibility studies, detailed simulations of the detector response and digitization, particle identification (PID)
and reconstruction, reconstruction of entire events.The interaction with GEANT4 classes is implemented via VMC.
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Thoroughly control over the production of secondaries, tuning of... -
Dario Lattuada (IFIN-HH/ELI-NP)25/04/2019, 15:40
A very brilliant gamma beam system with pencil-size beamspot will be installed at the Extreme Light Infrastructure - Nuclear Physics (ELI-NP), which is one of the pillars of the ELI Project. Monte Carlo simulations are crucial for the proper implementation of the instruments that will be used for experiments and for external users who come to perform experiments at the facility. For this...
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Maurício Pazianotto (Instituto Tecnológico de Aeronáutica), Miguel Antonio Cortes Giraldo (Depto. de Fis. Atom., Mole. y Nucl.-Universidad de Sevilla)25/04/2019, 16:40
In the last few decades, the development of aircraft with higher maximum cruising altitude and greater autonomy, as well as a significant increase of air traffic, has increased the problem of controlling the ionizing radiation dose level received by pilots, aircrew and aircraft electronics, and has begun to worry radioprotection and flight safety organizations. The study of the effects of...
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Jorge Lerendegui Marco (Universidad de Sevilla (ES))25/04/2019, 17:00
Monte Carlo (MC) simulations are a key tool to study the fundamental features of a neutron beam, such as the neutron flux or the γ-ray background, in the design and optimization of experimental facilities. Traditionally, the most widely used MC codes in this field had been MCNPX and FLUKA. However, the Geant4 toolkit has also become a competitive code for the transport of neutrons after the...
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Mostafa Jamalipour (University of Milano-Bicocca)25/04/2019, 17:20
A study has been carried out in order to see the feasibility of Nanodiamond Particles (NDP) application as a reflector for Cold Neutrons (CN), Very Cold Neutrons (VCN) and Ultra Cold Neutrons (UCN) in Geant4. NDP has a large scattering angle probability against VCN and UCN compared to the other materials due to their high optical potential. This unique feature makes this powder a prominent...
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Mrs Elisabet Galiana (LIP ULisboa USC)25/04/2019, 17:40Other applications
The study of environmental radiation is a challenging task. It is well known that natural gamma radiation may vary depending on the altitude, type of soil, building materials and even human presence. All these variables and uncertainties make it difficult to foresee the background radiation present at a specific region beforehand. In order to better understand the contributions of each...
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Hossein Rafikheiri (NSTRI)25/04/2019, 18:00
Depth profiling and morphological characterization of thin film is of critical importance to a wide variety of modern technologies. Back scattering spectroscopy using MeV ion beams is considered as a powerful method for depth profiling elements in the near surface layer of solids. Generally, this technique is a one-dimensional method and the roughness and inhomogeneity of the target often is...
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25/04/2019, 18:20
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Dennis Herbert Wright26/04/2019, 09:00
The Geant4 radioactive decay process, models and databases have undergone many
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upgrades during the past several years. These include refactoring the analog and biased decay to allow more efficient sampling, the modularization of the models which implement the various decay modes, physics improvements of the final state particle spectra for many of the decay modes, and the addition of new... -
Dr Emilio Mendoza (CIEMAT)26/04/2019, 09:40
Geant4 uses the so called G4ParticleHP package to model the low energy neutron and charged particle interactions according to the information available in ENDF-6 format data libraries. In these libraries the photon production is presented in some cases in an uncorrelated way, for example for neutron capture reactions. Thus, this information can not be used to produce the secondary...
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32. Extending GEANT4 “Radioactive Decay” for the Analysis of Complex Total Absorption Analysis CasesDr Enrique Nácher (IFIC (CSIC-Univ. of Valencia))26/04/2019, 10:00
We will present a new event generator created for the calculation of the response functions of total absorption spectrometers used in the study of complex beta decays. The development is based on an extension of the Radioactive Decay package. In the even generator, the level scheme of the decay of interest is divided in two regions: one region in which the original information from high...
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paolo agnes (University of Houston)26/04/2019, 10:20
Low-background experiments searching for dark matter, neutrinos and other rare processes heavily rely on GEANT4 in order to calibrate the detector responses, estimate the background rate and topology, predict the expected signals. Moreover, Monte Carlo simulations are extensively used in order to optimize the design of new experiments. The physics involved includes low-energy hadronic...
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Javier Balibrea Correa (INFN - National Institute for Nuclear Physics)26/04/2019, 11:10
Many experiments operate detectors that are susceptible to fast neutron-induced backgrounds [1]. To decrease these backgrounds many collaborations, including the nuclear astrophysics community, operate their experiments in deep underground laboratories. But even in such low background environments it is critical to accurately know the environmental neutron flux.
One way to measure this is the...
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Dr Giulia D'Imperio (Universita di Roma I 'La Sapienza'-Universita e INFN, Roma I)26/04/2019, 11:30
The SABRE experiment (Sodium-iodide with Active Background REjection) will search for dark matter through the annual modulation in the rate of ultra-pure NaI(Tl) crystals. Dark matter signal is expected to modulate yearly because of the rotation of Earth around Sun, and thus the change of the relative velocity of the detector with respect to the dark matter halo.
The first phase of the...
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Makoto Asai (SLAC National Accelerator Laboratory (US))26/04/2019, 11:50
2019 is the 20th year anniversary of Geant4 public releases. After 20 years with several architectural evolutions, Geant4 is still steadily evolving. It finds quite a wide variety of user domains including high energy physics, nuclear physics, space engineering, medical applications, material science, radiation protection and security. In this presentation, we will present the current status...
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26/04/2019, 12:20
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Mr Pavel Detistov
The background radiation flash produced by stopping of ions in matter is a main obstacle for detection of lower energy gamma-rays transitions emited by short-lived excited states in unstable nuclear systems obtained in experiments with relativistic ion beams. The large number of produced X-rays blinds the detectors and their pile-up in the detector’s crystal volume may change the profile of...
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maroua bhar
The main purpose of this paper is to present an overall study of the specific absorbed fractions (SAFs) of photon and electron sources to assess the internal doses after incorporation of radionuclides into the human body. SAF values for self and cross-absorption were calculated for a uniform distribution of mono energetic photon and electron emitters with energies ranging from 15 keV to 3...
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Ms safa elj (safa)
Monte Carlo codes are among the most used tools today for calculations and simulations related to medical physics [1] and particularly for studies of low dose medical applications.
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In this work, we have undertaken on the development of an analytical model with the aim of calculating the deposit dose produced by ionizing radiation inside a medical phantom (filled with light water). The CNSTN... -
Mr Arnaud Trouche (Artenum Toulouse)
CEO of the Artenum company.
Please see the following links for further information:
www.artenum.com
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www.space-suite.eu -
Dr Giada Petringa (INFN-LNS)
CATANA (Centro di AdroTerapia ed Applicazioni Nucleari Avanzate) was the first Italian protontherapy facility dedicated to the treatment of ocular neoplastic pathologies. Since 2002, it is in operation at the LNS Laboratories of the Italian Institute for Nuclear Physics (INFN-LNS), to date 400 patients have been successfully treated. Nowadays, a slightly increased biological effectiveness...
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Katherine Krawec (University of Sheffield)
Part of the ReDRESS Innovate UK project.
There is a need to test difficult to access, thick section steel components for weld defects and in-service corrosion that may lead to pressure vessel/component failure in the nuclear power generation industry that requires the application of high sensitivity ultrasonic testing (UT) techniques.
This project conducts research into the construction and...
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Dr Mohammed
Abstract:
Introduction: Molecular imaging is a model of visualization the cellular function and follow-up the molecular process in living organisms. Positron Emission Tomography (PET) is one of these imaging modalities. The essential objective in molecular imaging modalities is to gain images with optimized quality and exhaustive data of object to provide a detailed report about the...
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Ms MERIEM FIAK (UNIVERSITE HASSAN 2 DE CASABLANCA, FACULTE DES SCIENCES BEN M'SIK, EQUIPE DE RECHERCHE SUBATOMIQUE ET APPLICATION)
During the last few years, Monte Carlo simulation is considered to be the gold standard method for radiation dose calculations. Thanks to the accuracy and the flexibility that it supplies, MC method is the most used for dose prediction in external radiation therapy. This work aims to set up a full geometrical model of an 18 MV Varian Clinac 2100C medical linear accelerator in photon mode,...
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Olga Golub (NRNU MEPHi)
We present the energy dependence of the cross section for the inelastic interaction of protons and helium nuclei with the tungsten in the energy range from a few hundred MeV to a hundred GeV using the data of the PAMELA space experiment. It was intended for the precision measurements of the cosmic ray fluxes of different nature and include a set of detectors for the reliable determination of...
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Elena Nunnenmann (KIT)
In the plasma of fusion reactors, tritium and deuterium react to create helium and a 14.1MeV neutron, which escapes the magnetic containment. For defining and verifying requirements and boundary conditions for fusion reactor systems, the neutron transport through reactor components and the interactions of neutrons with the encountered materials has to be assessed. To this end, 3D Monte Carlo...
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