A5026498718- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Nuclear physics research studies
- CCD and CMOS Imaging Sensors
- Distributed and Parallel Computing Systems
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Big Data Technologies and Applications
- Digital Radiography and Breast Imaging
- Structural Analysis of Composite Materials
- X-ray Spectroscopy and Fluorescence Analysis
- Particle Accelerators and Free-Electron Lasers
- Astronomy and Astrophysical Research
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2024
Institut de Recherche sur les Lois Fondamentales de l'Univers
2015-2024
CEA Paris-Saclay
2015-2024
Université Paris-Saclay
2017-2024
Charles University
2023
The University of Adelaide
2016-2023
University of California, Santa Cruz
2023
Johannes Gutenberg University Mainz
2019
DSM (Netherlands)
2014-2015
Institut Laue-Langevin
2012-2013
We report on the measurement of first 2(+) and 4(+) states (66)Cr (70,72)Fe via in-beam γ-ray spectroscopy. The nuclei interest were produced by (p,2p) reactions at incident energies 260 MeV/nucleon. experiment was performed Radioactive Isotope Beam Factory, RIKEN, using DALI 2γ-ray detector array novel MINOS device, a thick liquid hydrogen target combined with vertex tracker. A low-energy plateau 2(1)(+) 4(1)(+) as function neutron number observed for N≥38 N≥40 even-even Cr Fe isotopes,...
In-beam γ-ray spectroscopy of ^{79}Cu is performed at the Radioactive Isotope Beam Factory RIKEN. The nucleus interest produced through proton knockout from a ^{80}Zn beam 270 MeV/nucleon. level scheme up to 4.6 MeV established for first time and results are compared Monte Carlo shell-model calculations. We do not observe significant feeding excited states below 2.2 MeV, which indicates that Z=28 gap N=50 remains large. show can be described in terms valence outside ^{78}Ni core, implying...
Proton inelastic scattering of $^{72,74}\mathrm{Ni}$ and $^{76,80}\mathrm{Zn}$ ions at energies around 235 MeV/nucleon was performed the Radioactive Isotope Beam Factory studied using $\ensuremath{\gamma}$-ray spectroscopy. Angular integrated cross sections for direct to ${2}_{1}^{+}$ ${4}_{1}^{+}$ states were measured. The Jeukenne-Lejeune-Mahaux folding model, extended beyond 200 MeV, used together with neutron proton densities stemming from quasiparticle random-phase approximation (QRPA)...
The structures of the neutron-rich $^{69,71,73}\mathrm{Co}$ isotopes were investigated via $(p,2p)$ knockout reactions at Radioactive Isotope Beam Factory, RIKEN. Isotopes interest studied using DALI2 $\ensuremath{\gamma}$-ray detector array combined with MINOS target and tracker system. Level schemes reconstructed $\ensuremath{\gamma}\text{\ensuremath{-}}\ensuremath{\gamma}$ coincidence technique, tentative spin-parity assignments based on measured inclusive exclusive cross sections....
The nuclear structure of the $^{76}\mathrm{Ni}$ nucleus was investigated by ($p,2p$) reaction using a NaI(Tl) array to detect deexciting prompt $\ensuremath{\gamma}$ rays. A new transition with an energy 2227 keV identified $\ensuremath{\gamma}\ensuremath{\gamma}$ and $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\gamma}$ coincidences. According these coincidence spectra observed connects state at 4147 previously known ${4}_{1}^{+}$ 1920 keV. Two weaker transitions were also obtained...
Twenty-one two-proton knockout (p,3p) cross sections were measured from neutron-rich nuclei at ∼250 MeV/nucleon in inverse kinematics. The angular distribution of the three emitted protons was determined for first time, demonstrating that kinematics are consistent with two sequential proton-proton collisions within projectile nucleus. Ratios over (p,2p) inclusive follow trend other many-nucleon removal reactions, further reinforcing nature nuclei.
Piggyback Micromegas consists in a novel readout architecture where the anode element is made of resistive layer on ceramic substrate. The deposited thin substrate by an industrial process which provides large dynamic range resistivity (10$^6$ to 10$^{10}$\,M$\Omega$/square). particularity this new structure that active part entirely dissociated from read-out element. This gives flexibility design and scheme. Without significant loss, signals are transmitted capacitive coupling pads....
The software package ANTS (Anger-camera type Neutron detector: Toolkit for Simulations), developed simulation of Anger-type gaseous detectors thermal neutron imaging was extended to include a module experimental data processing. Data recorded with sensor array containing up 100 photomultiplier tubes (PMT) or silicon photomultipliers (SiPM) in custom configuration can be loaded and the positions energies events reconstructed using Center-of-Gravity, Maximum Likelihood Least Squares algorithm....
A novel read-out architecture has been developed for the Micromegas detector. The anode element is made of a resistive layer on ceramic substrate. detector part entirely separated from element. Without significant loss, signals are transmitted by capacitive coupling to pads. provides high gas gain, good energy resolution and assures spark protection electronics. This assembly could be combined with modern pixel array electronic ASICs. readout organization free how pixels designed, arranged...
Resistive-anode micromegas detectors have been in development for several years, an effort to solve the problem of sparks when working at high flux and ionizing radiation like HL-LHC (up ten times luminosity LHC). They chosen as one technologies that will be used ATLAS New Small Wheel project (forward muon system). An ageing study is mandatory assess their capabilities handle environment on a long-term period. A prototype has exposed types irradiation (X-rays, cold neutrons, 60Co gammas...
Excited states in 63,65,67Mn were studied via in-beam γ-ray spectroscopy following knockout reactions from 68Fe. Similar level schemes, consisting of the 11/2−, 9/2−, 7/2− and 5/2g.s.− sequence, connected by I→I−1 transitions, established, first time for 65,67Mn. Their structures show features consistent with strongly-coupled rotational bands K=5/2. State-of-the-art shell-model calculations modified LNPS effective interaction reproduce observed levels remarkably well suggest dominance...
A custom and fully interactive simulation package ANTS (Anger-camera type Neutron detector: Toolkit for Simulations) has been developed to optimize the design operation conditions of secondary scintillation Anger-camera gaseous detectors thermal neutron imaging. The code accounts all physical processes related capture, energy deposition pattern, drift electrons primary ionization scintillation. photons are traced considering wavelength-resolved refraction transmission output window....
Fifty-five inclusive single nucleon-removal cross sections from medium mass neutron-rich nuclei impinging on a hydrogen target at ∼250 MeV/nucleon are measured the RIKEN Radioactive Isotope Beam Factory. Systematically higher found for proton removal with an even number of protons as compared to odd-proton projectiles given neutron separation energy. Neutron display no even-odd splitting, contrary nuclear cascade model predictions. Both effects understood through simple considerations...
The steadily increasing luminosity of the LHC requires an upgrade with high-rate and high-resolution detector technology for inner end cap ATLAS muon spectrometer: New Small Wheels (NSW). In order to achieve goal precision tracking at a hit rate about 15 kHz/cm$^2$ radius NSW, large area Micromegas quadruplets 100\,\microns spatial resolution per plane have been produced. % IRFU, from CEA research center Saclay, is responsible production validation LM1 modules. construction, production,...
Resistive-anode Micromegas detectors are in development since several years, an effort to solve the problem of sparks when working high flux and radiations environment like HL-LHC (ten times luminosity LHC). They have been chosen as one technologies that will be part ATLAS New Small Wheel project (forward muon system). An ageing study is mandatory assess their capabilities handle on a long-term period. A prototype has exposed types irradiations (X-rays, cold neutrons, 60 Co gammas) up...
Abstract During the past 20 years, idea that non-spherical planetary nebulae might need a binary or interaction to be shaped was discussed by various authors. It is now generally agreed varied morphologies of cannot fully explained solely single star evolution. Observationally, more central stars have been discovered, opening new possibilities understand connections between binarity and morphology. So far, ≃45 detected, most being close systems detected via flux variability. In order...
In 2007 TNO started to fly some sensors on an unmanned helicopter platform. These included RGB, B/W and thermal infrared cameras. 2008 a spectrometer was added. The goal for 2010 is be able offer low altitude flying platform including several sensors. Development of these will take place the next years. Since total weight payload should < 7kg, requirements individual quite strict. Applications include gas concentrations, water quality, pipelines, etc. Collaboration still possible. Combining...
The MINOS (MagIc Numbers Off Stability) collaboration has developed a compact vertex tracker for in-beam gamma spectroscopy of very exotic nuclei. It comprises cylindrical time projection chamber with Micromegas amplification plane, based on curved Micromegas, and two off-the-shelf silicon detectors. In total, ~5000 channels. Besides performance goals, the readout electronics system was designed to be versatile upgradable minimal effort. hardware part consists three types custom-made cards....