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News & Highlighted Publications

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Journées européennes du Patrimoine 2018

Journées européennes du Patrimoine : Dimanche 16 septembre, c’est un public intéressé et curieux qui s’est pressé autour du Linac, premier instrument scientifique classé monument historique et exposé sous vitrine extérieure en libre accès près du bâtiment 100 de l’IPN d’Orsay. Les visiteurs ont pu poser toutes leurs questions à propos de cette impressionnante structure de cuivre et ont bénéficié des explications personnalisées de Denis Jouan, chercheur CNRS et chargé de mission Patrimoine à l’IPN. La (...)

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Precision Measurement of the First Ionization Potential of Nobelium

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 lead to unique chemical properties. Applying the sensitive Radiation Detected Resonance Ionization Spectroscopy (RADRIS) technique at the SHIP velocity filter at GSI, allowed probing the optical (...)

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Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy

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 effects and highly correlated systems. These studies are hampered by low production rates and the fact that atomic information is only available from theoretical predictions. Only recently, optical (...)

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A new leading contribution to neutrinoless double-beta decay

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. However, the origin of neutrino masses remains a mystery. They can arise from an interaction with the Higgs field that violates lepton number, makes neutrinos Majorana particles, and potentially (...)

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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IPN Orsay collaborates on first MRTOF-MS experiments at 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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IPN Orsay delivered the klystrons for the FAIR project at GSI

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As part of the FAIR project, a proton linac (pLinac) is planned to accelerate protons up to 70 MeV. The duration of the pulse beam is 70 μs and the current during the pulse is 70 mA. The linac will consist of an RFQ and 6 cavities Crossed-bar-H (CH) accelerating the beam to its final energy. The (...)

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Publications

Phase transition dynamics for hot nuclei: a definitive answer

An abnormal production of events with almost equal-sized fragments was theoretically proposed as a signature of spinodal instabilities responsible for nuclear multifragmentation in the Fermi energy domain. On the other hand finite size effects are predicted to strongly reduce this abnormal production. High statistics quasifusion hot nuclei produced in central collisions between Xe and Sn isotopes at 32 and 45 AMeV incident energies have been used to definitively establish, through the (...)

B. Borderie, N. Le Neindre, E. Galichet , P. Napolitani et al

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Mapping the demise of collective motion in nuclei at high excitation energy

Abstract High energy gamma-rays from the 116Sn + 24Mg reaction at 23A MeV were measured using the MEDEA detector at LNS – INFN Catania. Combining this new data with previous measurements yields a detailed view of the quenching of the Giant Dipole Resonance as a function of excitation energy in nuclei of mass A in the range 120&#xF7 ;132" role="presentation"> The transition towards the disappearance of the dipole strength, which occurs around 230 MeV excitation energy, appears to (...)

D. Santonocito, Y. Blumenfeld, …, C. Monrozeau et al

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The extreme light infrastructure—nuclear physics (ELI-NP) facility: new horizons in physics with 10 PW ultra-intense lasers and 20 MeV brilliant gamma beams

Show full author list The European Strategy Forum on Research Infrastructures (ESFRI) has selected in 2006 a proposal based on ultra-intense laser fields with intensities reaching up to 1022–1023 W cm−2 called ’ELI’ for Extreme Light Infrastructure. The construction of a large-scale laser-centred, distributed pan-European research infrastructure, involving beyond the state-of-the-art ultra-short and (...)

Gales1,2, K A Tanaka1, D L Balabanski1, F Negoita1, D Stutman1,3, O Tesileanu1, C A Ur1, D Ursescu1, I Andrei1, S Ataman1

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Development of radioactive beams at ALTO: Part 1. Physicochemical comparison of different types of UCx targets using a multivariate statistical approach

(a) Institut de Physique Nucléaire d’Orsay CNRS/IN2P3 UMR 8608 - Université Paris Sud - Université Paris Saclay, F-91406 Orsay Cedex (b) Laboratoire de Physique de la Matière Condensée, CNRS, Ecole Polytechnique - Université Paris Saclay, Route de Saclay, F-91128 Palaiseau (c) Institut de Chimie Moléculaire et des Matériaux d’Orsay CNRS UMR 8182 - Université Paris Sud - Université Paris Saclay, F-91405 Orsay Cedex (d) Institut de Chimie et des Matériaux Paris-Est CNRS UMR 7182 - Université Paris Est (...)

Julien Guillot (a*), Sandrine Tusseau-Nenez (b), Brigitte Roussière (a), Nicole Barré-Boscher (a), François Brisset (c), Sylvain Denis (d)

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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 symmetric cumulants. These observables are robust against biases originating from nonflow effects. The centrality dependence of correlations between the higher order harmonics (the quadrangular v4 and (...)

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 densities and isospin asymmetries equivalent to those existing in multi-Λ hypernuclei. In this way, we provide an upper bound for the prediction of the Λ pairing gap and its (...)

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 angle between two identical superfluid nuclei (symmetric collisions) on transfer probabilities and fusion barrier have been uncovered. A theory making contact with experiments (...)

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

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60 ans IPN Orsay/LAL

To be noted

Rencontres d’été de physique de l’infiniment grand à l’infiniment petit

16-27 juillet 2018, Orsay - Palaiseau - Paris Saclay

La 8e édition des Rencontres de Physique de l’Infiniment grand à l’infiniment petit (...)

Réunion du Consortium CTA (Cherenkov Telescope Array)

14-18 mai 2018

L’IPN d’Orsay, en partenariat avec le CEA-IRFU et le LLR Palaiseau, organise la réunion (...)

PHENIICS Fest - Edition 2018

May 28-29, 2018 – LAL, bât.200

PHENIICS Fest is a two day event organized by the students, for students of the Ecole (...)

Workshop Perspectives 4e édition

Paris, 22-23 juin 2018, campus Jussieu UPMC

L’association D2I2, Doctorants et Docteurs des Deux Infinis, qui vise à mettre en relation les (...)

Ecole Joliot-Curie 2018 (EJC2018)

October 7-12, La Grande Motte

The 37th edition of the Joliot-Curie International School, entitled "Correlataions between (...)

Rencontres d’été de physique de l’infiniment grand à l’infiniment petit

16-27 juillet 2018, Orsay - Palaiseau - Paris Saclay

Les rencontres d’été de physique s’adressent à des étudiant(e)s de niveau L3 ou équivalent en (...)

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 (...)

1er Workshop PRAE

8-10 Octobre 2018, Campus d’Orsay

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Le premier Workshop international PRAE aura lieu du 8 au 10 octobre à l’IPN d’Orsay et au LAL. (...)

Congrès général 2019 de la SFP

8-12 juillet 2019, Cité des congrès de Nantes

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Organisé tous les deux ans, le Congrès Général de la Société Française de Physique offre un panorama (...)


Seminars

Neutrino and nuclear properties from coherent elastic neutrino-nucleus scattering

Carlo Giunti

INFN, Sezione di Torino

le 26/09/2018 à 11:00

IPN Orsay, salle A018, bâtiment 100


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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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