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Publications récentes

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Development of radioactive beams at ALTO : Part 2. Influence of the UCx target microstructure on the release properties of fission products

Julien Guillot (a*), Brigitte Roussière (a), Sandrine Tusseau-Nenez (b), Denis Grebenkov (b), Nicole Barré-Boscher (a), Elie Borg (a), Julien Martin (a) (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

Abstract : Producing intense radioactive beams, in particular those consisting of short-lived isotopes requires the control of the release efficiency. The released fractions of 11 elements were measured on 14 samples that were characterized by various physicochemical analyses in a correlated paper (Part 1). A multivariate statistical approach, using the principal component analysis, was performed to highlight the impact of the microstructure on the (...)

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Beyond-mean-field effective masses in the nuclear Fermi liquid from axial breathing modes

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

Axial breathing modes are studied within the nuclear energy-density-functional theory to discuss the modification of the nucleon effective mass produced beyond the mean-field approximation. This analysis is performed with the subtracted second random-phase approximation (SSRPA) model applied to two nuclei, 48Ca and 90Zr. Analyzing the centroid energies of axial breathing modes obtained with the mean-field-based random-phase approximation and with the beyond-mean-field SSRPA model, we (...)

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

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