A5032105719- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Particle physics theoretical and experimental studies
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Advanced Chemical Physics Studies
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- Astro and Planetary Science
- Distributed and Parallel Computing Systems
- Radioactive Decay and Measurement Techniques
- Quantum, superfluid, helium dynamics
- Particle Accelerators and Free-Electron Lasers
- Mass Spectrometry Techniques and Applications
- Nuclear Materials and Properties
- Scientific Research and Discoveries
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- X-ray Spectroscopy and Fluorescence Analysis
Université de Bordeaux
2015-2025
Laboratoire Photonique, Numérique et Nanosciences
2025
Laboratoire de Physique des deux infinis Bordeaux
2014-2023
Institut National de Physique Nucléaire et de Physique des Particules
2014-2023
Centre National de la Recherche Scientifique
2014-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2022
University of Padua
2022
Michigan State University
1998-2019
National Superconducting Cyclotron Laboratory
1998-2019
European Organization for Nuclear Research
2017
Neutron-induced reaction cross sections of short-lived nuclei are imperative to understand the origin heavy elements in stellar nucleosynthesis and for societal applications, but their measurement is extremely complicated due radioactivity targets involved. One way overcoming this issue combine surrogate reactions with unique possibilities offered by heavy-ion storage rings. In work, we describe first surrogate-reaction experiment inverse kinematics, which successfully conducted at...
In an experiment at the SISSI-LISE3 facility of GANIL, decay proton drip line nucleus $^{\mathrm{45}}\mathrm{F}\mathrm{e}$ has been studied. Fragment-implantation events have correlated with radioactive in a $16\ifmmode\times\else\texttimes\fi{}16$ pixel silicon-strip detector. The decay-energy spectrum implants shows distinct peak $(1.14\ifmmode\pm\else\textpm\fi{}0.04)\text{ }\text{ }\mathrm{M}\mathrm{e}\mathrm{V}$ half-life ${T}_{1/2}=({4.7}_{\ensuremath{-}1.4}^{+3.4})\text{...
New experimental data obtained mainly at the GSI/FRS facility allow to modify empirical parametrization of fragmentation cross sections, EPAX. It will be shown that minor modifications parameters lead a much better reproduction measured sections. The most significant changes refer description yields close projectile and memory effect neutron-deficient projectiles.
The structure of the halo nucleus 11Be has been studied using reaction 9Be(11Be,10Be+gamma)X at 60 MeV/nucleon. ground state is determined by comparing experimental cross sections to a calculation combining spectroscopic factors from shell model with l-dependent single-particle obtained in an eikonal model. This experiment shows dominant 1s character and indicates small contribution 0d admixture wave function. After correction for approximately 22% intensity excited levels, clean precise...
The probabilities for γ-ray and particle emission as a function of the excitation energy decaying nucleus are valuable observables constraining ingredients models that describe deexcitation nuclei near threshold. These essential in nuclear astrophysics applications. In this paper, we have first time simultaneously measured neutron <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Pb</a:mi><a:mprescripts/><a:none/><a:mn>208</a:mn></a:mmultiscripts></a:math>....
A new isomeric 0(+) state was identified as the first excited in self-conjugate (N=Z) nucleus 72Kr. By combining for time conversion-electron and gamma-ray spectroscopy with production of metastable states high-energy fragmentation, electric-monopole decay isomer to ground established. The is understood band head known prolate rotational structure, which strongly supports interpretation that 72Kr one rare nuclei having an oblate-deformed state. This observation gives fact evidence a shape...
The nucleus 54Zn has been observed for the first time in an experiment at SISSI/LISE3 facility of GANIL quasifragmentation a 58Ni beam 74.5 MeV/nucleon (nat)Ni target. fragments were analyzed by means ALPHA-LISE3 separator and implanted silicon-strip detector where correlations space between implantation subsequent decay events allowed us to generate almost background free spectra about 25 different nuclei same time. Eight observed. From correlated events, half-life is determined be...
Ramsey's method of separated oscillatory fields is applied to the excitation cyclotron motion short-lived ions in a Penning trap improve precision their measured mass values. The theoretical description extracted ion-cyclotron-resonance line shape derived and its correctness demonstrated experimentally by measuring $^{38}\mathrm{Ca}$ nuclide with an uncertainty $1.1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}8}$ using spectrometer ISOLTRAP at CERN. superallowed beta emitter...
In an experiment at the SISSI/LISE3 facility of GANIL, we have studied decay two proton-rich nuclei $^{45}\mathrm{Fe}$ and $^{48}\mathrm{Ni}$. We identified 30 implantations observed for second time four implantation events 17 cases, decays by two-proton emission with a energy 1.154(16) MeV half-life ${T}_{1/2}={1.6}_{\ensuremath{-}0.3}^{+0.5}$ ms. The observation $^{48}\mathrm{Ni}$ its allows us to deduce ${T}_{1/2}={2.1}_{\ensuremath{-}0.7}^{+2.1}$ One out is completely compatible...
The two protons emitted in the decay of 54Zn have been individually observed for first time a projection chamber. total energy and half-life measured this work agree with results obtained previous experiment. Angular correlations between are determined compared to theoretical distributions three-body model. Within shell model framework, relative probabilities show strong contribution p2 configuration two-proton emission. After 45Fe, present result on constitutes only second case direct...
In an experiment with the BigRIPS separator at RIKEN Nishina Center, we observed two-proton (2p) emission from ^{67}Kr. At same time, no evidence for 2p of ^{59}Ge and ^{63}Se, two other potential candidates this exotic radioactivity, could be observed. This observation is in line Q value predictions which pointed to ^{67}Kr as being best new candidate among three radioactivity. only fourth ground-state emitter a half-life order few milliseconds. The decay energy was determined 1690(17) keV,...
This work reports production cross sections for more than 190, mostly neutron-rich, isotopes in the region of closed N=126 neutron shell, by fragmentation a 208Pb beam. The represents step toward making regions located at outermost borders chart nuclides experimentally accessible with new-generation radioactive-beam facilities, such as nuclei near A=195 nucleosynthesis ``waiting point''.
We have measured the Coulomb dissociation of 8B into 7Be and a proton at 254 MeV/nucleon using large-acceptance focusing spectrometer. The astrophysical S17-factor for 7Be(p,γ)8B reaction Ec.m.=0.25–2.78MeV is deduced yielding S17(0)=20.6±1.2 (expt) ±1.0(theor)eVb. This result agrees with presently adopted zero-energy obtained in direct-reaction measurements results other Coulomb-dissociation studies performed 46.5 51.2 MeV/nucleon.Received 8 April...
In an experiment at the SISSI/LISE3 facility of GANIL, we used projectile fragmentation a primary 58Ni26+ beam 74.5 MeV/nucleon with average current 3 &mgr;A on natural nickel target to produce very neutron-deficient isotopes. 10-day experiment, 287 42Cr isotopes, 53 45Fe 106 49Ni and 4 48Ni isotopes were unambiguously identified. The doubly magic nucleus 48Ni, observed for first time, is most proton-rich isotope ever identified isospin projection T(z) = -4. It probably last "classical"...
In an experiment at the SISSI/LISE facility of GANIL, we used projectile fragmentation a ${}^{78}\mathrm{Kr}$ primary beam 73 MeV/nucleon to produce new isotopes astrophysical interest. We obtained clear evidence for existence five ${}^{60}\mathrm{Ga}$, ${}^{64}\mathrm{As}$, ${}^{69,70}\mathrm{Kr}$, and ${}^{74}\mathrm{Sr}$. However, did not find any ${}^{69}\mathrm{Br}$, whereas comparable nuclei were observed with more than 1000 counts. The isotope ${}^{69}\mathrm{Br}$ is thus deduced be...
We present the observation of an isomeric decay in very neutron deficient nucleus ${}_{36}^{74}\mathrm{Kr}.$ The isomer is interpreted as excited 0${}^{+}$ state, consistent with long standing prediction high deformation prolate/oblate shape coexistence this nucleus. magnitude $E0$ matrix element deduced for ${0}_{2}^{+}\ensuremath{\rightarrow}{0}_{1}^{+}$ transition gives strong support to a highly deformed oblate rotor.
Today with the advent of intense radioactive beams, we have access to nuclear spectroscopy and reaction studies nuclei far from stability. It has been demonstrated that Time Projection Chambers (TPC) method can be very effective as an active target for such yielding low thresholds, efficiency luminosity [1]. To this end a Generic Electronic system TPCs (GET) is in development will cover small medium sized instrumentation (64 32 k channels) relatively wide charge dynamic ranges event rates up...
The decay of the ground-state two-proton emitter 45Fe was studied with a time-projection chamber and emission two protons unambiguously identified. total energy half-life measured in this work agree results from previous experiments. present result constitutes first direct observation individual long-lived emitter. In parallel, we identified for time directly 43Cr, known beta-delayed technique developed opens way to detailed study mechanism ground state as well radioactivity.
GET is an international program to develop a reconfigurable and scalable medium sized system cover nuclear physics requirements for instruments with up 30k electronic channels.