A5066028568- Particle Detector Development and Performance
- Nuclear physics research studies
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Atomic and Molecular Physics
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Astronomical and nuclear sciences
- Atomic and Subatomic Physics Research
- Advancements in PLL and VCO Technologies
- Distributed and Parallel Computing Systems
- Quantum Chromodynamics and Particle Interactions
- Advanced Chemical Physics Studies
- Nuclear reactor physics and engineering
- Advanced Data Storage Technologies
- X-ray Spectroscopy and Fluorescence Analysis
- CCD and CMOS Imaging Sensors
- Radiation Effects in Electronics
- Distributed systems and fault tolerance
- Parallel Computing and Optimization Techniques
- Interconnection Networks and Systems
- Boron Compounds in Chemistry
- Rare-earth and actinide compounds
Institut de Recherche sur les Lois Fondamentales de l'Univers
2015-2024
CEA Paris-Saclay
2015-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2024
Université Paris-Saclay
2017-2024
Laboratoire de Physique Corpusculaire
2016
ETH Zurich
2011-2012
DSM (Netherlands)
2011
Institut polytechnique de Grenoble
2007
Direction de la Recherche Technologique
2007
CEA Grenoble
2007
The T2K experiment observes indications of ν(μ) → ν(e) appearance in data accumulated with 1.43×10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario |Δm(23)(2)| = 2.4×10(-3) eV(2), sin(2)2θ(23) 1 and sin(2)2θ(13) 0, expected number such is 1.5±0.3(syst). Under this hypothesis, probability to observe six or more candidate 7×10(-3), equivalent 2.5σ significance. At 90% C.L., are consistent 0.03(0.04) < 0.28(0.34)...
The T2K experiment is a long baseline neutrino oscillation experiment. Its main goal to measure the last unknown lepton sector mixing angle θ13 by observing νe appearance in νμ beam. It also aims make precision measurement of known parameters, Δm232 and sin22θ23, via disappearance studies. Other goals include various cross-section measurements sterile searches. uses an intense proton beam generated J-PARC accelerator Tokai, Japan, composed beamline, near detector complex (ND280), far...
A kinematically complete quasi-free $(p,pn)$ experiment in inverse kinematics was performed to study the structure of Borromean nucleus $^{17}$B, which had long been considered have neutron halo. By analyzing momentum distributions and exclusive cross sections, we obtained spectroscopic factors for $1s_{1/2}$ $0d_{5/2}$ orbitals, a surprisingly small percentage 9(2)$\%$ determined $1s_{1/2}$. Our finding such component halo features reported prior experiments can be explained by deformed...
Khufu's Pyramid is one of the largest archaeological monument all over world, which still holds many mysteries. In 2016 and 2017, ScanPyramids team reported on several discoveries previously unknown voids by cosmic-ray muon radiography that a non-destructive technique ideal for investigation large-scale structures. Among these discoveries, corridor-shaped structure has been observed behind so-called Chevron zone North face, with length at least 5 meters. A dedicated study this was thus...
Subjecting a physical system to extreme conditions is one of the means often used obtain better understanding and deeper insight into its organization structure. In case atomic nucleus, such approach investigate isotopes that have very different neutron-to-proton (N/Z) ratios than in stable nuclei. Light, neutron-rich exhibit most asymmetric N/Z those lying beyond limits binding, which undergo spontaneous neutron emission exist only as short-lived resonances (about 10-21 s), provide...
The structure and decay of the most neutron-rich beryllium isotope, ^{16}Be, has been investigated following proton knockout from a high-energy ^{17}B beam. Two relatively narrow resonances were observed for first time, with energies 0.84(3) 2.15(5) MeV above two-neutron threshold widths 0.32(8) 0.95(15) MeV, respectively. These assigned to be ground (J^{π}=0^{+}) excited (2^{+}) state, E_{x}=1.31(6) MeV. mass excess ^{16}Be was thus deduced 56.93(13) some 0.5 more bound than only previous...
The T2K (Tokai-to-Kamioka) experiment is a long baseline neutrino oscillation in Japan, for which near detector complex (ND280), used to characterize the beam, will be built 280 m from target off-axis direction of beam produced using 50 GeV proton synchrotron J-PARC (Japan Proton Accelerator Research Complex). central part ND280 including 3 large Time Projection Chambers based on Micromegas gas amplification technology with anodes pixelated into about 125,000 pads and requiring therefore...
We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km beam from Tokai to Kamioka is first implementation off-axis technique long-baseline neutrino oscillation With data corresponding $1.43\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons on target, we observe 31 fully-contained single $\ensuremath{\mu}$-like ring events Super-Kamiokande, compared with an expectation $104\ifmmode\pm\else\textpm\fi{}14\text{ }(\mathrm{syst})$ without oscillations. best-fit...
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...
In this document, we present the Technical Design Report of Upgrade T2K Near Detector ND280. The goal upgrade is to improve performance measure neutrino interaction rate and constrain cross-sections so that uncertainty in number predicted events at Super-Kamiokande reduced about 4%. This will allow physics reach T2K-II project. achieved by modifying upstream part detector, adding a new highly granular scintillator detector (Super-FGD), two TPCs (High-Angle TPC) six TOF planes. Details...
The first $\ensuremath{\gamma}$-ray spectroscopy of $^{52}\mathrm{Ar}$, with the neutron number $N=34$, was measured using $^{53}\mathrm{K}(p,2p)$ one-proton removal reaction at $\ensuremath{\sim}210\text{ }\text{ }\mathrm{MeV}/\mathrm{u}$ RIBF facility. ${2}_{1}^{+}$ excitation energy is found 1656(18) keV, highest among Ar isotopes $N>20$. This result experimental signature persistence $N=34$ subshell closure beyond $^{54}\mathrm{Ca}$, i.e., below magic proton $Z=20$. Shell-model...
Exclusive cross sections and momentum distributions have been measured for quasifree one-neutron knockout reactions from a $^{54}\mathrm{Ca}$ beam striking on liquid hydrogen target at $\ensuremath{\sim}200\text{ }\text{ }\mathrm{MeV}/u$. A significantly larger section to the ${p}_{3/2}$ state compared ${f}_{5/2}$ observed in excitation of $^{53}\mathrm{Ca}$ provides direct evidence nature $N=34$ shell closure. This finding corroborates arising new closure neutron-rich calcium isotopes. The...
The first measurement of the low-lying states neutron-rich ^{110}Zr and ^{112}Mo was performed via in-beam γ-ray spectroscopy after one proton removal on hydrogen at ∼200 MeV/nucleon. 2_{1}^{+} excitation energies were found 185(11) keV in ^{110}Zr, 235(7) ^{112}Mo, while R_{42}=E(4_{1}^{+})/E(2_{1}^{+}) ratios are 3.1(2), close to rigid rotor value, 2.7(1), respectively. These results compared modern energy density functional based configuration mixing models using Gogny Skyrme effective...
The formation of a dineutron in the nucleus $^{11}$Li is found to be localized surface region. experiment measured intrinsic momentum struck neutron via $(p,pn)$ knockout reaction at 246 MeV/nucleon. correlation angle between two neutrons is, for first time, as function momentum. A comparison with calculations reveals localization $r\sim3.6$ fm. results also support density dependence deduced from Hartree-Fock-Bogoliubov nuclear matter.
In this work we investigate the two-neutron decay of 13Li and excited states 11Li populated via one-proton removal from 14Be 12Be, respectively. A phenomenological model is used to describe 13Li. While first one displays important sequential components, second appears dominated by direct decay. microscopic three-body extract information on spatial configuration emitted neutrons before shows that average distance between increases going
We report on the first γ-ray spectroscopy of low-lying states in neutron-rich 98,100Kr isotopes obtained from 99,101Rb(p,2p) reactions at ∼220 MeV/nucleon. A reduction 2+1 state energies beyond N=60 demonstrates a significant increase deformation, shifted neutron number compared to sharper transition observed strontium and zirconium isotopes. State-of-the-art beyond-mean-field calculations using Gogny D1S interaction predict level good agreement with experimental results. The identification...
Excited states in the $N=40$ isotone $^{62}$Ti were populated via $^{63}$V$(p,2p)$$^{62}$Ti reaction at $\sim$200~MeV/u Radioactive Isotope Beam Factory and studied using $γ$-ray spectroscopy. The energies of $2^+_1 \rightarrow 0^{+}_{\mathrm{gs}}$ $4^+_1 2^+_1$ transitions, observed here for first time, indicate a deformed ground state. These are increased compared to neighboring $^{64}$Cr $^{66}$Fe isotones, suggesting small decrease quadrupole collectivity. present measurement is well...