Mass Measurements IPN collaborates on first direct mass measurements around Z=100 with a Multireflection Time of Flight Mass Spectrograph (MRTOFMS) at RIKENRIBF One of the most important features of superheavy nuceli (SHE) is the appearance of an "island of stability" where shape and shell (...)
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 CrossedbarH (CH) accelerating the beam to its final energy. The (...)
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 accessible via the study of generalized parton distributions (GPDs), which we probe with hard exclusive scattering reactions. Deeplyvirtual Compton scattering (DVCS) reaction is the preferred probe of GPDs (...)
Phys. Rev. Lett. 119, 202004 (2017)
Au cours d’une expérience réalisée auprès de l’accélérateur cryogénique de l’Australian National University (Canberra, Australie), une collaboration francoaustralienne1 a pour la première fois identifié simultanément en masse et en numéro atomique Z jusqu’au plutonium, les fragments créés dans des réactions de quasifission. La quasifission est le mécanisme dominant dans les collisions très dissipatives entre noyaux très lourds. Elle est en compétition avec le mécanisme de fusion utilisé pour synthétiser de (...)
PHYS. REV. LETT. 119, 222502 (2017)
"One of the most important properties of nuclei is saturation : although nuclear interactions are attractive overall, the growth in binding energy tapers off as the number of nucleons in the nucleus increases. As a consequence, heavy nuclei have some properties of a liquid drop. The simplest nucleus  the deuteron  has a small binding energy, which has led to a recent suggestion by Bira van Kolck and collaborators that nuclei can be described in a systematic expansion around the (...)
PHYS. REV. LETT. 119, 223002 (2017)
The 78Ni nucleus, with 28 protons and 50 neutrons, is a cornerstone for nuclear structure as it is one of the most exotic nuclei with two magic numbers. The study of its protonneighbour 79Cu allows to understand the movement of a single proton around 78Ni and it is therefore a powerful tool (...)
Phys. Rev. Lett. 119, 192501 (2017
The second random–phase–approximation model corrected by a subtraction procedure designed to cure double counting, instabilities, and ultraviolet divergences, is employed for the first time to analyze the dipole strength and polarizability in 48Ca. All the terms of the residual interaction are included, leading to a fully selfconsistent scheme. Results are illustrated with two Skyrme parametrizations, SGII and SLy4. Those obtained with the SGII interaction are particularly (...)
D. Gambacurta, M. Grasso, O. Vasseur
In the analysis of transfer reaction data to extract nuclear structure information the choice of input parameters to the reaction model such as distorting potentials and overlap functions has a significant impact. In this paper we consider a set of data for the (d,t) and (d,3He) reactions on 14,16,18O as a welldelimited subject for a study of the sensitivity of such analyses to different choices of distorting potentials and overlap functions with particular reference to a previous (...)
F. Flavigny, N. Keeley, A. Gillibert, and A. Obertelli
Perturbing fluids of neutrons and protons (nuclear matter) may lead, as the most catastrophic effect, to the rearrangement of the fluid into clusters of nucleons. A similar process may occur in a single atomic nucleus undergoing a violent perturbation, like in heavyion collisions tracked in particle accelerators at around 30 to 50 MeV per nucleon : in this conditions, after the initial collision shock, the nucleus expands and then clusterizes into several smaller nuclear fragments. (...)
P. Napolitani and M. Colonna
The N = 52 83Ga β decay was studied at ALTO. The radioactive 83Ga beam was produced through the ISOL photofission technique and collected on a movable tape for the measurement of γ ray emission following β decay. While βdelayed neutron emission has been measured to be 56–85% of the decay path, in this experiment an unexpected highenergy 5–9 MeV γ ray yield of 16(4)% was observed, coming from states several MeVs above the (...)
A. Gottardo, D. Verney, I. Deloncle, S. Péru, C. Delafosse, S. Roccia, I. Matea, C. Sotty, C. Andreoiu, C. Costache, M.C. Delattre, A. Etilé, S. Franchoo, C. Gaulard, J. Guillot, F. Ibrahim, M. Lebois, M. MacCormick, N. Marginean, R. Marginean, M. Martini, C. Mihai, I. Mitu, L. Olivier, C. Portail, L. Qi, B. Roussière, L. Stan, D. Testov, J. Wilson, D.T. Yordanov
Discussing fourpoint Green functions of bilinear quark currents in largeN_c QCD, we formulate rigorous criteria for selecting diagrams appropriate for the analysis of potential tetraquark poles. We find that both flavorexotic and cryptoexotic (i.e., flavornonexotic) tetraquarks, if such poles exist, have a width of order O(1/N_c^2), so they are parametrically narrower compared to the ordinary mesons, which have a width of order O(1/N_c). Moreover, for flavorexotic states, the (...)
Hagop Sazdjian
We report on the investigation of Δ(1232) production and decay in protonproton collisions at a kinetic energy of 1.25 GeV measured with HADES. Exclusive dilepton decay channels ppe+e− and ppe+e−γ have been studied and compared with the partialwave analysis of the hadronic ppπ0 channel. They allow to access both Δ+→pπ0(e+e−γ) and Δ+→pe+e− Dalitz decay channels. The perfect reconstruction of the wellknown π0 Dalitz decay serves as a proof of the consistency of the analysis. The Δ Dalitz decay is (...)
Inspired by the lowdensity LeeYang expansion for the energy of a dilute Fermi gas of density ρ and momentum kF, we introduce here a Skyrmetype functional that contains only swave terms and provides, at the meanfield level, (i) a satisfactory equation of state for neutron matter from extremely low densities up to densities close to the equilibrium point, and (ii) a goodquality equation of state for symmetric matter at density scales around (...)
M. Grasso, D. Lacroix, and C. J. Yang
1418 mai 2018
L’IPN d’Orsay, en partenariat avec le CEAIRFU et le LLR Palaiseau, organise la réunion (...)
May 2829, 2018 – LAL, bât.200
PHENIICS Fest is a two day event organized by the students, for students of the Ecole (...)
Jordy de Vries
NIKHEF Amsterdam
le 24/05/2018 à 11:00
IPN Orsay, salle A015, bâtiment 100
Joachim Stroth
Goethe University  GSI Darmstadt
le 24/05/2018 à 14:00
IPN Orsay, salle des Conseils, bâtiment 100
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