Benoit Gervais
University of Caen Lower Normandy
Dissociation (chemistry)PhysicsCluster (physics)Kinetic energyIonElectronChemical physicsExcited stateAtomic physicsChemistryMaterials scienceMonte Carlo methodIonizationDimerFragmentation (mass spectrometry)SpectroscopyMoleculeMolecular physicsSpectral lineProjectileCarbonDicationGround stateExcitationPotential energy
Publications 117
#1Veronica Tessaro (National University of Rosario)
#2Benoit Gervais (UNICAEN: University of Caen Lower Normandy)H-Index: 19
Last. M E Galassi (National University of Rosario)H-Index: 15
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Abstract null null Purpose null To develop a particle transport code to compute w-values and stopping power of swift ions in liquid water and gases of interest for reference dosimetry in hadrontherapy. To analyze the relevance of inelastic and post-collisional processes considered. null null null Methods null The Monte Carlo code MDM was extended to the case of swift ion impact on liquid water (MDM-Ion). Relativistic corrections in the inelastic cross sections and the post-collisional Auger emis...
#1A. Méry (UNICAEN: University of Caen Lower Normandy)H-Index: 13
#2V. Kumar (UNICAEN: University of Caen Lower Normandy)
Last. Amine Cassimi (UNICAEN: University of Caen Lower Normandy)H-Index: 26
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The authors use a COLTRIMS setup and Coulomb-explosion imaging to deduce the structure of (CO){}_{2}from two- and three-body dissociation induced by collisions with highly charged argon ions. The structure of the dimer is found to be very diffuse and to be compatible with a purely random orientation of each CO molecule in the dimer. The mean intermolecular distance is found to correspond to the predicted true ground state of the CO dimer with a planar C-bonded geometry.
#1R. Ramos (UCBL: Claude Bernard University Lyon 1)
#2F. Poignant (UCBL: Claude Bernard University Lyon 1)H-Index: 3
Last. Michael Beuve (UCBL: Claude Bernard University Lyon 1)H-Index: 16
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In a previous work, we extended and benchmarked the MDM Monte Carlo code with available data for gold metallic media irradiated by electron beams. In this paper, we worked with the aim of improving the cross sections on which our Monte Carlo simulation is based, and which are essential for an accurate description of the transport of electrons in gold. The mesoscopic potential of solid gold has been predicted, and its sensitivity toward electron emission has been evaluated. This potential was der...
#1Floriane Poignant (Lyon College)
#1Floriane PoignantH-Index: 2
Last. Michael Beuve (Lyon College)H-Index: 4
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Abstract The use of gold nanoparticles to enhance radiation therapy efficiency has been thoroughly investigated over the past two decades. While theoretical studies have mostly focused on physical mechanisms and dose enhancement, studies of free radical production are scarce. In this work, we investigated the primary yield of free radicals ( O • H and H 2 O 2 ) induced by 20–90 keV monoenergetic photons, for small GNPs concentrations. Our study is based on a Monte Carlo approach which enables el...
3 CitationsSource
#1F. Poignant (UCBL: Claude Bernard University Lyon 1)H-Index: 3
#2Andrei IpatovH-Index: 2
Last. Michael Beuve (UCBL: Claude Bernard University Lyon 1)H-Index: 16
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Simulation of transport of electrons through matter is used in many applications. Some of them need models that are both efficient in terms of computing time and accurate over a wide range of electron energy. For certain applications such as radiochemistry and radiotherapy enhanced by metallic nanoparticles, it is desirable to consider relatively low-energy electrons. We have implemented a physical model for electron transport down to low energy in solid metallic media that meets both of the afo...
7 CitationsSource
#1Lucie HuartH-Index: 1
#1Lucie Huart (Université Paris-Saclay)H-Index: 1
Last. Marie-Anne Hervé du Penhoat (University of Paris)H-Index: 6
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The description of the biological effects of ionizing radiation requires a good knowledge of the dose deposition processes at both the cellular and molecular scales. However, experimental studies on the energy deposition specificity of sub-keV electrons, produced by most radiations, including high-energy photons and heavy ions, are scarce. Soft X-rays (0.2–2 keV) are here used to probe the physical and physico-chemical events occurring upon exposure of liquid water to sub-keV electrons. Liquid w...
1 CitationsSource
#1Wei Bo LiH-Index: 14
#1W.B. LiH-Index: 2
Last. Yibao Zhang (PKU: Peking University)H-Index: 10
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Abstract Purpose Targeted radiation therapy has seen an increased interest in the past decade. In vitro and in vivo experiments showed enhanced radiation doses due to gold nanoparticles (GNPs) to tumors in mice and demonstrated a high potential for clinical application. However, finding a functionalized molecular formulation for actively targeting GNPs in tumor cells is challenging. Furthermore, the enhanced energy deposition by secondary electrons around GNPs, particularly by short-ranged Auger...
17 CitationsSource
#1X FlechardH-Index: 5
Last. Amine CassimiH-Index: 26
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The Coulombic explosion of multi-charged (CO)3 q+ molecular ions produced in low energy collisions with Ar9+ projectiles was investigated using recoil ion momentum spectrometry (RIMS). A preliminary analysis of the data clearly shows a dominant triangular cyclic structure. Events that may correspond to a linear chain are also observed, but the latter could as well originate from false coincidences, associated to the fragmentation of dimers. A careful analysis of this source of background is prop...
#1A. MéryH-Index: 12
Last. Amine CassimiH-Index: 26
view all 16 authors...
#1V.B. Tessaro (CONICET: National Scientific and Technical Research Council)H-Index: 1
#1Veronica Tessaro (University of Lyon)
Last. M E Galassi (National University of Rosario)H-Index: 15
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Abstract The W-values and the differential values w, were calculated by electron, proton and antiproton impact on liquid and vapor water. Two different theoretical approximations were used: the Fowler Equation (based on the Continuous Slowing Down Approximation), and the Monte Carlo code MDM, which does an event-by-event tracking of all generated particles in the media. The dependence on the type and charge of the projectiles and the relevance on the appropriate inelastic cross sections employed...
4 CitationsSource