A5074030124- Nuclear Physics and Applications
- Laser-Plasma Interactions and Diagnostics
- Nuclear physics research studies
- High-pressure geophysics and materials
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Laser-induced spectroscopy and plasma
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Laser Design and Applications
- Dark Matter and Cosmic Phenomena
- Quantum, superfluid, helium dynamics
- Particle physics theoretical and experimental studies
- X-ray Spectroscopy and Fluorescence Analysis
- Particle accelerators and beam dynamics
- Astronomical and nuclear sciences
- Advanced X-ray and CT Imaging
- Magnetism in coordination complexes
- Quantum Chromodynamics and Particle Interactions
- Magnetic confinement fusion research
- Rare-earth and actinide compounds
- X-ray Diffraction in Crystallography
- Metalloenzymes and iron-sulfur proteins
- Superconducting Materials and Applications
CEA DAM Île-de-France
2011-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012-2025
GANIL
2008-2021
Centre d'Études Scientifiques et Techniques d'Aquitaine
2021
Institut de Recherche sur les Lois Fondamentales de l'Univers
2014-2021
Massachusetts Institute of Technology
2017
University of Rochester
2017
Energetics (United States)
2017
Indiana University Bloomington
2017
Ohio University
2017
We report on the g-factor measurement of first isomeric state in (16)43S27 [Ex=320.5(5) keV, T1/2=415(5) ns, and g=0.317(4)]. The 7/2- spin-parity isomer intruder nature ground nucleus are experimentally established for time, providing direct unambiguous evidence collapse N=28 shell closure neutron-rich nuclei. model, beyond mean-field semiempirical calculations, provides a very consistent description this showing that well deformed prolate quasispherical states coexist at low energy.
The high-energy petawatt PETAL laser system was commissioned at CEA’s Laser Mégajoule facility during the 2017–2018 period. This paper reports in detail on first experimental results obtained energetic particle and photon generation from solid foil targets, with special emphasis proton acceleration. Despite a moderately relativistic (<1019 W/cm2) intensity, energies as high 51 MeV have been measured significantly above those expected preliminary numerical simulations using idealized...
The paper describes the preparation of short-pulse high-energy laser PETawatt Aquitaine Laser (PETAL), which will be coupled to Megajoule (LMJ) CEA. LMJ/PETAL facility opened for academic access European researchers. In parallel, diagnostics are being developed within PETAL + project and many physical problems addressed ranging from study radiation generation activation issues problem large electromagnetic pulses.
This paper describes the development of a platform to study astrophysically relevant nuclear reactions using inertial-confinement fusion implosions on OMEGA and National Ignition Facility laser facilities, with particular focus optimizing charged-particle-producing reactions. Primary requirements are high yield, for statistics in product measurements, combined low areal density, allow charged products escape. is optimally achieved direct-drive exploding pusher thin-glass-shell capsules....
The laser megajoule (LMJ) and the National Ignition Facility (NIF) plan to demonstrate thermonuclear ignition using inertial confinement fusion (ICF). neutron yield is one of most important parameters characterize ICF experiment performance. For decades, activation diagnostic was chosen as a reference at facilities now planned be first nuclear on LMJ, measuring both 2.45 MeV 14.1 yields. Challenges for development are absolute calibration, accuracy, range requirement, harsh environment. At...
The inelastic neutron acceleration cross section on the long-lived metastable state of $^{177}\mathrm{Lu}$ has been measured using a direct method. High-energy neutrons have detected specially designed setup placed cold beam extracted from ORPHEE reactor in Saclay. $146\ifmmode\pm\else\textpm\fi{}19$ b flux confirms high for this process $^{177}\mathrm{Lu}$${}^{m}$ isomer. deviation $258\ifmmode\pm\else\textpm\fi{}58$ previously published obtained Maxwellian at 323 K temperature could be...
The neutrons for science (NFS) facility is a component of SPIRAL-2, the new superconducting linear accelerator built at GANIL in Caen (France). proton and deuteron beams delivered by will allow producing intense neutron fields 100 keV-40 MeV energy range. Continuous quasi-mono-kinetic spectra, respectively, be available NFS, produced interaction beam on thick Be converter 7Li(p,n) reaction thin converter. pulsed beam, with flux up to two orders magnitude higher than those other existing...
Inertial confinement fusion (ICF) requires a high resolution (~10 μm) neutron imaging system to observe deuterium and tritium (DT) core implosion asymmetries. A new large (150 mm entrance diameter: scaled for Laser MégaJoule [P. A. Holstein, F. Chaland, C. Charpin, J. M. Dufour, H. Dumont, Giorla, L. Hallo, S. Laffite, G. Malinie, Y. Saillard, Schurtz, Vandenboomgaerde, Wagon, Particle Beams 17, 403 (1999)]) detector has been developed such ICF experiments. The fully characterized using...
Numerous domains, in fundamental research as well applications, require the study of reactions induced by neutrons with energies from few MeV up to tens MeV. Reliable measurements also are necessary improve evaluated databases used nuclear transport codes. This energy range covers a large number topics like transmutation waste, design future fission and fusion reactors, medicine or test development new detectors. A facility called Neutrons For Science (NFS) is being built for this purpose on...
Full calculations of six-nucleon reactions with a three-body final state have been elusive and long-standing issue. We present neutron spectra from the T(t,2n)α (TT) reaction measured in inertial confinement fusion experiments at OMEGA laser facility ion temperatures 4 to 18 keV, corresponding center-of-mass energies (E_{c.m.}) 16 50 keV. A clear difference shape TT-neutron spectrum is observed between two E_{c.m.}, ^{5}He ground resonant peak 8.6 MeV being significantly stronger higher than...
A beam of 28 MeV He-8 particles with an average intensity 2 x 10(5) ions s(-1), produced by the SPIRAL facility at GANIL, was used to initiate fusion-evaporation reactions in thick targets Pb-201 and Bi-209. Excited states Po-212 At-213 were populated (He-8,4n) reactions. The emitted gamma-rays detected using EXOGAM array composed four Compton suppressed germanium Clover detectors a close geometry configuration. Preliminary results show that has been high spin (I similar or equal 14)...
A high resolution neutron imaging system is being developed and tested on the OMEGA laser facility for inertial confinement fusion experiments. This diagnostic uses a coded technique with penumbral or an annular aperture. The sensitiveness of these techniques to misalignment was pointed out both experiments simulations. Results obtained during shots are in good agreement calculations performed Monte Carlo code GEANT4. Both sensitive relative position source field view. then demonstrates be...
We have developed a new small neutron imaging system (SNIS) diagnostic for the OMEGA laser facility. The SNIS uses penumbral coded aperture and has been designed to record images from low yield (10(9)-10(10) neutrons) implosions such as those using deuterium fuel. This camera was tested at in 2009 on rugby hohlraum energetics experiment where it recorded an image of 1.4 × 10(10). resolution this 54 μm located only 4 meters target chamber centre. recently improved instrument by adding cooled...
Since the first experimental campaign conducted in 2014 with mid field Gated X-ray Imager (GXI) and two quadruplets (20 kJ at 351 nm) focused on target, Laser MégaJoule (LMJ) operational capability is still growing up. New plasma diagnostics have been implemented: a large 2D GXI, broadband x-ray spectrometers (called DMX miniDMX), specific soft spectrometer Entrance Hole (LEH) imaging diagnostic. A series of experiments performed leading to more than 60 shots target. We will present...
Transmission crystal spectrometers (TCS) are used on many laser facilities to record hard X-ray spectra. During experiments, signal recorded imaging plates is often degraded by a background noise. Monte-Carlo simulations made with the code GEANT4 show that this noise mainly generated diffusion of MeV electrons and very X-rays. An experiment, carried out at LULI2000, confirmed use magnets in front diagnostic, bent electron trajectories, reduces significantly background. The new spectrometer...
The SEPAGE spectrometer (Spectromètre Electrons Protons A Grandes Energies) was realized within the PETAL+ project funded by French ANR (French National Agency for Research). This plasma diagnostic, installed on LMJ-PETAL laser facility, is dedicated to measurement of charged particle energy spectra generated experiments using PETAL (PETawatt Aquitaine Laser). inserted inside 10-meter diameter LMJ experimental chamber with a SID (Diagnostic Insertion System) in order be close enough target....
The "Neutrons for Science" (NFS) facility will be a component of SPIRAL‐2, the future accelerator dedicated to production very intense radioactive ion beams, under construction at GANIL in Caen (France). NFS composed pulsed neutron beam in‐flight measurements and irradiation stations cross‐section material studies. Continuous quasi‐monokinetic energy spectra available respectively produced by interaction deuteron on thick Be converter 7Li(p,n) reaction thin converter. flux up 2 orders...
Most of luggage inspection systems, searching for presence an explosive threat, are based either on X-ray transmission technologies, such as radiography and computed tomography, or diffraction analysis (small angle coherent scattering). These techniques have limitations, especially in case large dense objects if they placed close to a wall not allowing access the rear side (for instance abandoned luggage). Portable systems using backscattered X-rays can be alternative solutions analyze...
This article reports the first measurements of high-energy photons produced with high-intensity PETawatt Aquitaine Laser (PETAL) laser. The experiments were performed during commissioning laser had an energy about 400 J, intensity 8 × 1018 W·cm−2, and a pulse duration 660 fs (FWHM). It was shot at 2 mm-thick solid tungsten target. mainly from bremsstrahlung process for relativistic electrons accelerated inside plasma generated on front side paper electrons, protons photons. Hot up to ≈35 MeV...
The neutron deficient rare-earth nuclei of the A∼130 region are particular interest since highly deformed prolate ground states expected. Indeed these predicted to show maximal ground-state deformations β2 ∼ 0.40 (axis ratio 3:2), comparable deformation deduced for superdeformed cerium isotopes at high spin. A fusion–evaporation experiment was performed with radioactive ion beams GANIL in October 2004 which had goal reach very proton-rich exotic located near proton drip-line. 76Kr beam,...