A5090411995- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- Mass Spectrometry Techniques and Applications
- Advanced NMR Techniques and Applications
- Astro and Planetary Science
- X-ray Spectroscopy and Fluorescence Analysis
- Magnetic confinement fusion research
- Radiation Detection and Scintillator Technologies
- Rare-earth and actinide compounds
- Particle Detector Development and Performance
- Laser-induced spectroscopy and plasma
- Superconducting Materials and Applications
- Nuclear Materials and Properties
- Neutrino Physics Research
- Muon and positron interactions and applications
- Inorganic Fluorides and Related Compounds
GANIL
2014-2024
Centre National de la Recherche Scientifique
2010-2022
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2010-2022
Institut National de Physique Nucléaire et de Physique des Particules
2009-2022
Direction de la Recherche Fondamentale
2022
Laboratoire National Henri Becquerel
2002-2020
GSI Helmholtz Centre for Heavy Ion Research
2003-2018
Université Paris-Saclay
2018
Institut de Physique
2018
Université Paris-Sud
2018
In-beam γ-ray spectroscopy using fragmentation reactions of both stable and radioactive beams has been performed in order to study the structure excited states neutron-rich oxygen isotopes with masses ranging from A=20 24. For produced fragments, energies, intensities, γ−γ coincidences have measured. Based on this information new level schemes are proposed for O21,22 up neutron separation energy. The nonobservation any γ-decay branch O23 O24 suggests that their lie above decay thresholds....
We present precision Penning trap mass measurements of neutron-rich calcium and potassium isotopes in the vicinity neutron number N=32. Using TITAN system, 51K was measured for first time, (51,52)Ca values were improved significantly. The new show a dramatic increase binding energy compared to those reported atomic evaluation. In particular, 52Ca is more bound by 1.74 MeV, behavior with deviates substantially from tabulated values. An increased predicted recently based on calculations that...
Abstract Resonant laser ionization and spectroscopy are widely used techniques at radioactive ion beam facilities to produce pure beams of exotic nuclei measure the shape, size, spin electromagnetic multipole moments these nuclei. However, in such measurements it is difficult combine a high efficiency with spectral resolution. Here we demonstrate on-line application atomic supersonic gas jet, technique suited for high-precision studies ground- isomeric-state properties located extremes...
The masses of 31 neutron-rich nuclei in the range A = 29-47 have been measured. precision 19 has significantly improved and 12 were measured for first time. Cl, S, P isotopes are seen to exhibit a change shell structure around N 28. Comparison with model relativistic mean field calculations demonstrate that observed effects arise from deformed prolate ground state configurations associated shape coexistence. Evidence coexistence is provided by observation an isomer 43S.
Mass measurements of very neutron-rich nuclei near the N=20 and 28 shell closures are presented. Seven masses have been determined for first time precision 36 has significantly improved. These results used to investigate evolution odd–even staggering binding energies with neutron number. Special attention is paid N=28 closure as dripline approached. Changes in structure observed around P S isotopes but not Si. This may be interpreted a persistence at or result sudden onset deformation 42Si.
The p((11)Li, (9)Li)t reaction has been studied for the first time at an incident energy of 3A MeV new ISAC-2 facility TRIUMF. An active target detector MAYA, built GANIL, was used measurement. differential cross sections have determined transitions to (9)Li ground and excited states in a wide range scattering angles. Multistep transfer calculations using different (11)Li model wave functions show that with strong correlations between halo neutrons are most successful reproducing observation.
The moment of inertia the yrast superdeformed band in Gd149 exhibits an unexpected bifurcation at high rotational frequency. States differing by four units angular momentum show energy shift about 60 eV. This indicates remnant a new quantum number associated with fourfold symmetry.Received 15 July 1993DOI:https://doi.org/10.1103/PhysRevLett.71.4299©1993 American Physical Society
A global optical model potential (GDP08) for $^{3}\mathrm{He}$ projectiles has been obtained by simultaneously fitting the elastic scattering data of from targets $40\ensuremath{\leqslant}{A}_{T}\ensuremath{\leqslant}209$ at incident energies $30\ensuremath{\leqslant}{E}_{\mathrm{inc}}\ensuremath{\leqslant}217$ MeV. Uncertainties and correlation coefficients between parameters were using bootstrap statistical method. GDP08 was found to satisfactorily account $^{3}\mathrm{H}$ as well, which...
Experimental search for ${}^{5}\mathrm{H}$ using a secondary beam of ${}^{6}\mathrm{He}$ has been performed. The transfer reaction ${}^{1}\mathrm{H}{(}^{6}\mathrm{He}{,}^{2}\mathrm{He}{)}^{5}\mathrm{H}$ was studied by detecting two protons emitted from the decay ${}^{2}\mathrm{He}$. A peak consistent with resonance at $1.7\ifmmode\pm\else\textpm\fi{}0.3\mathrm{MeV}$ above $n+n+t$ threshold observed, width $1.9\ifmmode\pm\else\textpm\fi{}0.4\mathrm{MeV}$. angular distribution measured as well...
The structure of 617−20C nuclei was investigated by means the in-beam γ-ray spectroscopy technique using fragmentation reactions radioactive beams. Based on particle-γ and particle-γγ coincidence data, level schemes are constructed for neutron-rich C17−20 nuclei. systematics first excited 2+ states in carbon isotopes is extended time to A=20 showing that contrast case oxygen isotopes, N=14 subshell closure disappears. Experimental results compared with shell-model calculations. Agreement...
The first conclusive evidence of a dipole resonance in ^{11}Li having isoscalar character observed from inelastic scattering with novel solid deuteron target is reported. experiment was performed at the newly commissioned IRIS facility TRIUMF. results show peak an excitation energy 1.03±0.03 MeV width 0.51±0.11 (FWHM). angular distribution consistent distorted-wave Born approximation framework. together shell model calculations signature that monopole tensor interaction important ^{11}Li. ab...
The isoscalar monopole response has been measured in the unstable nucleus (68)Ni using inelastic alpha scattering at 50A MeV inverse kinematics with active target MAYA GANIL. giant resonance (ISGMR) centroid was determined to be 21.1 ± 1.9 and indications for a soft mode are provided first time 12.9 1.0 MeV. Analysis of corresponding angular distributions distorted-wave-born approximation random-phase transition densities indicates that L = 0 multipolarity dominates cross section ISGMR...
Experimental search for the superheavy 7H isotope was performed in reaction p(8He,pp)7H with 8He beam at 61.3A MeV. The evidence existence of state near t+4n threshold obtained. In same experiment, p(8He,t) populating ground and excited 2(+) 6He investigated. obtained results argue on a specific structure containing subsystem large weight.
The existence of the $^{7}\mathrm{H}$ nuclear system was investigated via a one-proton transfer reaction with $^{8}\mathrm{He}$ beam at $15.4\mathrm{A}\text{ }\text{ }\mathrm{MeV}$ and $^{12}\mathrm{C}$ gas target. experimental setup based on active-target MAYA which allowed complete reconstruction kinematics. confirmed identification seven events where formed resonance energy ${0.57}_{\ensuremath{-}0.21}^{+0.42}\text{ above $^{3}\mathrm{H}+4n$ threshold width...
In-gas-cell laser ionization spectroscopy studies on the neutron deficient 97–101Ag isotopes have been performed with LISOL setup. Magnetic dipole moments and mean-square charge radii determined for first time exception of 101Ag, which was found in good agreement previous experimental values. The reported results allow tentatively assigning spin 97,99Ag to 92 confirming presence an isomeric state these two isotopes, whose collapsed hyperfine structure suggests a 12. effect N=50 shell closure...
Precise level lifetimes have been measured for various superdeformed bands in ${}^{148,149}\mathrm{Gd}$ and ${}^{152}\mathrm{Dy}$ with the Doppler-shift attenuation method. From derived quadrupole moments, ${Q}_{0}$, we find large differences deformation between yrast some excited gadolinium isotopes. Moreover, two of Gd band, which identical moments inertia, different elongations, supporting picture that alignment effects cancel bands.