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Publications récentes


Detection properties and internal activity of newly developed La-containing scintillator crystals

Giulia Hull, Michaël Josselin

In this work we will present the characterization, in terms of gamma response and internal activity of newly developed crystals that contains Lanthanum in their chemical formula. In particular we tested two LaBr3:Ce,Sr, one CLLBC and two CLLB crystals with different volumes. These crystals just overcome the prototype stage and, even if the production in still not standardized at least for large optics, they have been very recently commercialized in sizes interesting for high-energy (...)

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Study of light yield for different configurations of plastic scintillators and wavelength shifting fibers

Giulia Hull, Miktat Imre, Michaël Josselin, Alain Maroni, Tiina Suomijärvi

Abstract In the effort of the AugerPrime scintillator surface detector R&D activity, we investigated the performances of different extruded and cast plastic scintillators that were read out with wavelength-shifting (WLS) optical fibers and then coupled to a PMT. In particular we compared the light yield of eighteen scintillator/fiber configurations, obtained combining eight different scintillator bars with six fiber types, in order to investigate which was satisfying the AugerPrime (...)

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Spectroscopy of strongly deformed 32Ne by proton knockout reactions

I. Murray, M. MacCormick

Low-lying states of neutron-rich 32Ne were populated by means of one- and two-proton knockout reactions at the RIKEN Radioactive Isotope Beam Factory. A new transition is observed at 1410(15) keV and assigned to the 4+1→2+1 decay. With this energy the R4/2 ratio is calculated to be 2.99(6), lying close to the rigid rotor limit and suggests a high degree of collectivity and strongest deformation among neutron-rich neon isotopes. Comparisons of experimental inclusive and exclusive (...)

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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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UMR 8608 - CNRS/IN2P3

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