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Publications récentes

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Meson-catalyzed fusion in ultradense plasmas

C. Deutsch, J. P. Didelez, A. Bendib, and K. Bendib-Kalache

Abstract : "Negative muons in the MeV energy range can be fully stopped in warm dense matter. Mesonic catalysis of Deuterium-Tritium fusion reaction is shown to be possible in short-lived plasma targets, with rates that are orders of magnitude above cold deuterium reactions."

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Systematic study of giant quadrupole resonances with the subtracted second random-phase approximation : Beyond-mean-field centroids and fragmentation

O. Vasseur, D. Gambacurta, and M. Grasso

Abstract : A systematic analysis of giant quadrupole resonances is performed for several nuclei, from 30Si to 208Pb, within the subtracted second random-phase-approximation (SSRPA) model in the framework of the energy-density-functional theory. Centroid energies and widths of the isoscalar giant quadrupole resonances are compared with the corresponding random-phase-approximation (RPA) values. We find lower SSRPA centroid energies compared to (...)

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The central neutron detector for CLAS12

S. Niccolai, G. Hull, J. Bettane, P. Chatagnon, B. Garillon, B. Genolini, B. Guegan, M. Guidal, M. Imre, M. Josselin, D. Marchand, A. Maroni, B. Mathon, G. Murdoch, T. Nguyen Trung, J. Peyré, J. Pouthas, P. Rosier, D. Sokhan, C. Theneau, R.Wang

Abstract The Central Neutron Detector, a recently constructed scintillator barrel which is used in CLAS12 at Jefferson Lab to detect 0.2–1 GeV neutrons at backwards angles, is here described. The motivations and R&D tests leading to its final design, based on three radial layers of coupled paddles with one-side light readout by photomultipliers plus “U-turn” lightguides on the other side, are outlined. The performance of the detector, evaluated from cosmic-ray tests and (...)

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Phase transition dynamics for hot nuclei : a definitive answer

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

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 (...)

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

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

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 (...)

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

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