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Actualités et Faits Marquants

Precision Measurement of the First Ionization Potential of Nobelium

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One of the most important atomic properties governing an element’s chemical behavior is the energy required to remove its least-bound electron, referred to as the first ionization potential. For the heaviest elements, this fundamental quantity is strongly influenced by relativistic effects which (...)

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Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy

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Physical and chemical properties of the transfermium elements (Z > 100) are influenced by relativistic effects altering the configuration of the electron shell. Laser spectroscopy allows probing precisely atomic properties and thus gives access to a better understanding of relativistic (...)

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A new leading contribution to neutrinoless double-beta decay

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V. Cirigliano, W. Dekens, J. de Vries, M.L. Graesser, E. Mereghetti, S. Pastore, and U. van Kolck, Phys. Rev. Lett. 120 (2018) 202001 One of the most important advancements in modern particle physics was the observation of neutrino oscillations and the inference that neutrinos have mass. (...)

V. Cirigliano, W. Dekens, J. de Vries, M.L. Graesser, E. Mereghetti, S. Pastore, and U. van Kolck, Phys. Rev. Lett. 120 (2018) 202001

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Mesures de masse : l’IPN participe à des expériences originales menées à RIKEN-RIBF

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Mass Measurements IPN collaborates on first direct mass measurements around Z=100 with a Multireflection Time of Flight Mass Spectrograph (MRTOF-MS) at RIKEN-RIBF One of the most important features of superheavy nuceli (SHE) is the appearance of an "island of stability" where shape and shell (...)

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L’IPN a livré les klystrons du projet FAIR à GSI

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Dans le cadre du projet FAIR, un linac proton (pLinac) est prévu pour accélérer les protons jusqu’à 70 MeV. La durée du pulse faisceau est de 70 µs et le courant pendant l’impulsion est de 70 mA.. Le linac se composera d’un RFQ et de 6 cavités Crossed-bar-H (CH) accélérant le faisceau jusqu’à son énergie (...)

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First Exclusive Measurement of Deeply Virtual Compton Scattering off 4He : Toward the 3D Tomography of Nuclei

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M. Hattawy et al. (CLAS Collaboration), Phys. Rev. Lett. 119, 202004 (2017) A wealth of information on the structure of matter lies in the correlations between the momentum and spatial distributions of the fundamental constituents of matter : quarks and gluons. These correlations are (...)

Phys. Rev. Lett. 119, 202004 (2017)

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Publications récentes

Systematic studies of correlations between different order flow harmonics in Pb-Pb collisions at √sNN=2.76 TeV

The correlations between event-by-event fluctuations of anisotropic flow harmonic amplitudes have been measured in Pb-Pb collisions at √sNN=2.76 TeV with the ALICE detector at the Large Hadron Collider. The results are reported in terms of multiparticle correlation observables dubbed (...)

S. Acharya et al. (ALICE Collaboration)

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ΛΛ pairing in multistrange hypernuclei

Multistrange Ca, Sn, and Pb hypernuclei with ΛΛ pairing interaction are investigated within the Hartree-Fock-Bogoliubov approach. The unknown ΛΛ pairing strength is calibrated to match with the maximal value for the prediction of the Λ pairing gap in uniform matter for (...)

H. Güven, K. Bozkurt, E. Khan, and J. Margueron

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Microscopic description of pair transfer between two superfluid Fermi systems : Combining phase-space averaging and combinatorial techniques

In a mean-field description of superfluidity, particle number and gauge angle are treated as quasiclassical conjugated variables. This level of description was recently used to describe nuclear reactions around the Coulomb barrier. Important effects of the relative gauge (...)

David Regnier, Denis Lacroix, Guillaume Scamps, and Yukio Hashimoto

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Localization of pairing correlations in nuclei within relativistic mean field models

We analyze the localization properties of two-body correlations induced by pairing in the framework of relativistic mean field (RMF) models. The spatial properties of two-body correlations are studied for the pairing tensor in coordinate space and for the Cooper pair (...)

R.-D. Lasseri, J.-P. Ebran, E. Khan, and N. Sandulescu

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Long-wavelength phonons in the crystalline and pasta phases of neutron-star crusts

We study the long-wavelength excitations of the inner crust of neutron stars, considering three phases : cubic crystals at low densities, and rods and plates near the core-crust transition. To describe the phonons, we write an effective Lagrangian density in terms of the (...)

David Durel and Michael Urban

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The gluon and charm content of the deuteron

We evaluate the frame-independent gluon and charm parton-distribution functions (PDFs) of the deuteron utilizing light-front quantization and the impulse approximation. We use a nuclear wave function obtained from solving the nonrelativistic Schrödinger equation with the (...)

Stanley J. Brodsky, Kelly Yu-Ju Chiu, Jean-Philippe Lansberg, Nodoka Yamanaka

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High-resolution study of levels in the astrophysically important nucleus 26Mg and resulting updated level assignments

Background : The 22Ne(α,n)25Mg reaction is an important source of neutrons for the s-process. Direct measurement of this reaction and the competing 22Ne(α,γ)26Mg reaction are challenging due to the gaseous nature of both reactants, the low cross section and the experimental (...)

P. Adsley, J. W. Brümmer, T. Faestermann, S. P. Fox, F. Hammache, R. Hertenberger, A. Meyer, R. Neveling, D. Seiler, N. de Séréville, and H.-F. Wirth

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60 ans IPN Orsay/LAL

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Journées Rencontres Jeunes Chercheurs

14-20 Octobre 2018, Lège Cap-Ferret

Les Journées de Rencontres Jeunes Chercheurs (JRJC) se dérouleront du 14 au 20 Octobre 2018 au village vacances de Lège Cap-Ferret (Gironde). (...)


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IPN

Institut de Physique Nucléaire Orsay - 15 rue Georges CLEMENCEAU - 91406 ORSAY (FRANCE)
UMR 8608 - CNRS/IN2P3

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