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La spectroscopie laser des éléments les plus lourds dans un jet supersonique : l’IPN d’Orsay participe à une nouvelle technique expérimentale testée avec succès à IKS (Louvain)*

L’ionisation laser résonnante, c’est-à-dire la technique qui consiste à ioniser un atome par faisceau laser, ainsi que la spectroscopie laser, qui permet de déterminer la structure hyperfine des atomes, sont des techniques largement utilisées sur les installations qui produisent des faisceaux d’ions radioactifs. Ces méthodes permettent de produire des noyaux exotiques tout en mesurant leurs forme, taille et spin ainsi que les moments multipolaires électromagnétiques. Cependant, il reste difficile (...)

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IGLEX: end of construction site

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The IGLEX was decided between the two laboratories, IPNO and LAL, within the framework of the valley plan in 2012. The aim was to create a multidisciplinary centre with the two EQUIPEX ANDROMEDE and THOMX teams carried by these two laboratories. This centre is located in building 209 (named (...)

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Scientific news

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Des poussières interstellaires soumises au rayonnement cosmique : l’IPN participe à une simulation expérimentale de l’éjection de molécules carbonées par les grains interstellaires.

Les poussières interstellaires jouent un rôle essentiel dans l’équilibre radiatif des galaxies et naturellement dans l’apparence du ciel. Résultant de la condensation des gaz expulsés par les étoiles, elles sont de petits grains solides (composés essentiellement de carbone, d’oxygène, de silicium et de fer) dont les dimensions sont inférieures à un millionième de mètre. Une équipe de recherche multidisciplinaire* a caractérisé en laboratoire les effets des rayons cosmiques lourds sur le changement (...)

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Time-dependent mean-field determination of the excitation energy in transfer reactions: Application to the reaction 238U on 12C at 6.14 MeV/nucleon

Abstract : The internal excitation of nuclei after multinucleon transfer is estimated by using the time-dependent mean-field theory. Transfer probabilities for each channel as well as the energy loss after reseparation are calculated. By combining these two pieces of information, we show that the excitation energy distribution of the transfer fragments can be obtained separately for the different transfer channels. The method is applied to the (...)

G. Scamps, C. Rodríguez-Tajes, D. Lacroix, and F. Farget

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Non-Markovian dynamics of fully coupled fermionic and bosonic oscillators

Abstract : The non-Markovian Langevin approach is applied to study the dynamics of fermionic (bosonic) oscillator linearly coupled to a fermionic (bosonic) environment. The analytical expressions for occupation numbers in two different types of couplings (rotating-wave approximation and fully coupled) are compared and discussed. The weak-coupling and high- and low-temperature limits are considered as well. The conditions under which the environment (...)

V. V. Sargsyan, D. Lacroix, G. G. Adamian, and N. V. Antonenko

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Spectroscopy of 61Fe via the neutron transfer reaction 2H(60Fe,p)61Fe*

Abstract : The direct component of the 60Fe(n,γ)61Fe cross section was investigated by populating the bound states of the 61Fe nucleus through the (d,pγ) transfer reaction in inverse kinematics using a radioactive beam of 60Fe at 27A MeV. The experiment was performed at GANIL using the MUST2 array and an annular double-sided silicon strip detector for the detection of the light charged particle in coincidence with the photons measured in (...)

S. Giron, F. Hammache, N. de Séréville, P. Roussel, J. Burgender, M. Moukaddam et al.

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Time-of-flight secondary ion mass spectrometry imaging of biological samples with delayed extraction for high mass and high spatial resolutions

Abstract Rationale In Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS), pulsed and focused primary ion beams enable mass spectrometry imaging, a method which is particularly useful to map various small molecules such as lipids at the surface of biological samples. When using TOF-SIMS instruments, the focusing modes of the primary ion beam delivered by liquid metal ion guns can provide either a mass resolution of several thousand or a sub-µm lateral resolution, but the (...)

Quentin P. Vanbellingen, Nicolas Elie, Michael J. Eller, Serge Della-Negra, David Touboul, Alain Brunelle

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Feasibility study for the measurement of πN transition distribution amplitudes at ¯PANDA in ¯pp→J/ψπ0

Abstract The exclusive charmonium production process in ¯pp annihilation with an associated π0 meson ¯pp→J/ψπ0 is studied in the framework of QCD collinear factorization. The feasibility of measuring this reaction through the J/ψ→e+e− decay channel with the AntiProton ANnihilation at DArmstadt (¯PANDA) experiment is investigated. Simulations on signal reconstruction efficiency as well as the background rejection from various sources including the ¯pp→π+π−π0 and ¯pp→J/ψπ0π0 reactions are performed (...)

B. Singh et al. (PANDA collaboration)

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Inclusive Λ production in proton-proton collisions at 3.5 GeV

The inclusive production of Λ hyperons in proton-proton collisions at √s=3.18GeV was measured with HADES at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt. The experimental data are compared to a data-based model for individual exclusive Λ production channels in the same reaction. The contributions of intermediate resonances such as Σ(1385), Δ++, or N∗ are considered in detail. In particular, the result of a partial-wave analysis accounts for the abundant pK+Λ final state. (...)

J. Adamczewski-Musch et al. (HADES Collaboration)

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Combining symmetry breaking and restoration with configuration interaction: A highly accurate many-body scheme applied to the pairing Hamiltonian

Background : Ab initio many-body methods have been developed over the past ten years to address mid-mass nuclei. In their best current level of implementation, their accuracy is of the order of a few percent error on the ground-state correlation energy. Recently implemented variants of these methods are operating a breakthrough in the description of medium-mass open-shell nuclei at a polynomial computational cost while (...)

J. Ripoche, D. Lacroix, D. Gambacurta, J.-P. Ebran, and T. Duguet

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60 ans IPN Orsay/LAL

To be noted

Ecole Joliot-Curie 2017 (EJC2017)

Pré-inscriptions ouvertes

EJC2017 se déroulera du 24 au 29 septembre 2017 aux Issambres dans le Var. Le thème de cette (...)

Projet Qualité de Vie au Travail

La Direction des Ressources Humaines du CNRS lance un appel à projet "Qualité de Vie au Travail" (...)


Thermodynamics of the vector meson extended quark-meson model

Zsolt Szép

Eötvös University, Budapest

le 28/04/2017 à 11:00

Ecole Polytechnique, CPhT, Salle des conférences

Suivi des thèses : procédures et outils mis en place au LPSC ; intérêt d’une approche mutualisée (?)

David maurin

LPSC Grenoble

le 11/05/2017 à 14:00

IPN Orsay - Auditorium Irène Joliot-Curie, Bâtiment 100

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

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