A5023679556- Nuclear physics research studies
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Mass Spectrometry Techniques and Applications
- Particle accelerators and beam dynamics
- Astronomy and Astrophysical Research
- Radioactive Decay and Measurement Techniques
- Adaptive optics and wavefront sensing
- Quantum Chromodynamics and Particle Interactions
- Muon and positron interactions and applications
- Advanced Chemical Physics Studies
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Particle physics theoretical and experimental studies
- Radioactive contamination and transfer
- Nuclear reactor physics and engineering
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- X-ray Spectroscopy and Fluorescence Analysis
- Gamma-ray bursts and supernovae
- Dark Matter and Cosmic Phenomena
- Chemical Thermodynamics and Molecular Structure
- Digital Accessibility for Disabilities
Université Paris-Saclay
2011-2025
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2020-2025
Centre National de la Recherche Scientifique
2015-2024
Institut de Recherche sur les Lois Fondamentales de l'Univers
2024
Institut National de Physique Nucléaire et de Physique des Particules
2014-2023
UK Astronomy Technology Centre
2007-2022
Royal Observatory
2003-2022
Max Planck Institute for Nuclear Physics
2009-2022
European Organization for Nuclear Research
2018-2022
Astronomical Observatory of Capodimonte
2022
The mass of the nucleus, through its binding energy, continues to be capital importance not only for various aspects nuclear physics, but also other branches notably weak-interaction studies and astrophysics. authors first describe modern experimental techniques dedicated particularly challenging task measuring exotic nuclides make detailed comparisons. Though tremendous progress in these associated production has been made, allowing access very far from stability, it is still yet possible...
Context.The infrared wide-field camera (WFCAM) is now in operation on the 3.8 m UK Infrared Telescope Mauna Kea. WFCAM currently has fastest survey speed of any world, and combined with generous allocations telescope time, will produce deep maps sky from Z to K band. The data a set public surveys, known as UKIDSS, be initially available astronomers ESO member states, later world.
SCUBA-2 is an innovative 10000 pixel bolometer camera operating at submillimetre wavelengths on the James Clerk Maxwell Telescope (JCMT). The has capability to carry out wide-field surveys unprecedented depths, addressing key questions relating origins of galaxies, stars and planets. With two imaging arrays working simultaneously in atmospheric windows 450 850 microns, vast increase count means that maps sky 100-150 times faster than previous SCUBA instrument. In this paper we present...
Modeling the composition of neutron-star crusts depends strongly on binding energies neutron-rich nuclides near $N=50$ and $N=82$ shell closures. Using a recent development time-of-flight mass spectrometry for on-line purification radioactive ion beams to access more exotic species, we have determined first time $^{82}\mathrm{Zn}$ with ISOLTRAP setup at ISOLDE-CERN facility. With robust model based nuclear energy-density-functional theory, solve general relativistic...
The mean-square charge radii of $^{207,208}\mathrm{Hg}$ ($Z=80$, $N=127$, 128) have been studied for the first time and those $^{202,203,206}\mathrm{Hg}$ ($N=122$, 123, 126) remeasured by application in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). characteristic kink in $N=126$ neutron shell closure has revealed, providing information on its behavior below $Z=82$ proton closure. A theoretical analysis performed within relativistic Hartree-Bogoliubov nonrelativistic...
High-precision mass measurements of more than 30 neutron-rich nuclides around the $Z=28$ closed proton shell were performed with triple-trap spectrometer ISOLTRAP at ISOLDE/CERN to address question a possible neutron closure $N=40$. The results for $^{57,60,64\ensuremath{-}69}\mathrm{Ni}$ ($Z=28$), $^{65\ensuremath{-}74,76}\mathrm{Cu}$ ($Z=29$), and $^{63\ensuremath{-}65,68\ensuremath{-}78}\mathrm{Ga}$ ($Z=31$) have relative uncertainty order ${10}^{\ensuremath{-}8}$. In particular,...
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...
High-precision mass and charge radius measurements on $^{17--22}\mathrm{Ne}$, including the proton-halo candidate $^{17}\mathrm{Ne}$, have been performed with Penning trap spectrometry collinear laser spectroscopy. The $^{17}\mathrm{Ne}$ uncertainty is improved by factor 50, radii of $^{17--19}\mathrm{Ne}$ are determined for first time. fermionic molecular dynamics model explains pronounced changes in ground-state structure. It attributes large to an extended proton configuration ${s}^{2}$...
The first direct mass-measurement of $^{6}$He has been performed with the TITAN Penning trap mass spectrometer at ISAC facility. In addition, $^{8}$He was determined improved precision over our previous measurement. obtained masses are $m$($^{6}$He) = 6.018 885 883(57) u and $m$($^{8}$He) 8.033 934 44(11) u. value shows a deviation from literature 4$\sigma$. With these new values previously measured atomic isotope shifts we obtain charge radii 2.060(8) fm 1.959(16) for respectively. We...
The masses of the neutron-rich copper isotopes Cu75–79 are determined using precision mass spectrometer ISOLTRAP at CERN-ISOLDE facility. trend from new data differs significantly that previous results, offering a first accurate view surface adjacent to Z=28, N=50 nuclide Ni78 and supporting doubly magic character. compare very well with large-scale shell-model calculations predict shape coexistence in island inversion for Z<28. A coherent picture this important exotic region begins emerge...
The neutron-deficient Hg isotopes have been a paradigm for nuclear shape coexistence. ground states of these nuclei exhibit striking structural differences from the neighboring Pb isotopes, and are very challenging to study experimentally. Here, new state-of-the-art data extend information on charge radii (and electromagnetic moments) lightest ever measured using laser spectroscopy. results suggest sudden decrease in deformation an end region ground-state staggering. These provide...
HiPERCAM is a portable, quintuple-beam optical imager that saw first light on the 10.4-m Gran Telescopio Canarias (GTC) in 2018. The instrument uses re-imaging optics and 4 dichroic beamsplitters to record $u_s g_s r_s i_s z_s$ ($320-1060$ nm) images simultaneously its five CCD cameras, each of 3.1 arcmin (diagonal) field view. detectors are frame-transfer devices cooled thermo-electrically 183 K, thereby allowing both long-exposure, deep imaging faint targets, as well high-speed (over 1000...
Mass measurements with the ISOLTRAP mass spectrometer at CERN-ISOLDE improve uncertainties of neutron-deficient tin isotopes towards doubly magic <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Sn</a:mi><a:mprescripts/><a:none/><a:mn>100</a:mn></a:mmultiscripts></a:math>. The uncertainty <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mmultiscripts><b:mi>Sn</b:mi><b:mprescripts/><b:none/><b:mn>103</b:mn></b:mmultiscripts></b:math> was reduced by a factor...
Using resonant laser ionization, β-decay studies, and for the first time mass measurements, three β-decaying states have been unambiguously identified in Cu70. A excess of −62 976.1(1.6) keV a half-life 44.5(2) s (6−) ground state determined. The level energies (3−) isomer at 101.1(3) with T1/2=33(2) 1+ 242.4(3) T1/2=6.6(2) are confirmed by high-precision measurements. low-lying levels Cu70 populated decay Ni70 transfer reactions compare well large-scale shell-model calculations, wave...
An 60Fe peak in a deep-sea FeMn crust has been interpreted as due to the signature left by ejecta of supernova explosion close solar system 2.8+/-0.4 Myr ago [Knie, Phys. Rev. Lett. 93, 171103 (2004)10.1103/PhysRevLett.93.171103]. In an attempt confirm this interpretation with better time resolution and obtain more direct flux estimate, we measured concentrations along dated marine sediment. We find no at expected level from 1.7 3.2 ago. Possible causes for discrepancy are discussed.
Mass measurements of (96,97)Kr using the ISOLTRAP Penning-trap spectrometer at CERN-ISOLDE are reported, extending mass surface beyond N=60 for Z=36. These new results show behavior in sharp contrast to heavier neighbors where a sudden and intense deformation is present. We interpret this as establishment nuclear quantum phase transition critical-point boundary. The masses confirm findings from mean-square charge-radius up but variance with conclusions recent gamma-ray spectroscopy.