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“创新——核科学技术发展的不竭源泉”——中国核学会2009年学术年会

作者： A.Richard A.K.Nasirov g.mandaglio M.Manganaro g.giardina K.Hagino China Institute of Atomic Energy Universite de Strasbourg(Uds) 67037 StrasbourgFrance Joint Institute of Nuclear Research 141980 DubnaRussia

The angular distributions of fission fragments for the S+W reaction near Coulomb barrier energies were *** experimental fission excitation function is *** measured fission cross sections are decomposed into fusion-fission,quasifission and fast fission contributions by the dinuclear system *** hindrance to complete fusion both at small and large collision energies is *** fusion excitation functions of S+ Zr in an energy range from above to below Coulomb barrier were measured and *** obvious effect of positive Q-value neutron transfers has been observed in the S+Zr *** addition,the excitation functions of quasielastic scattering at a backward angle have been measured for the systems of O + Pb,Pt,W,and Sm at energies well below the Coulomb barrier. Considering the coupling effects,the extracted diffuseness parameters are close to the values extracted from the systematic analysis of elastic and inelastic scattering data.

关键词： fusion-fission quasifission fusion enhancement neutron transfer surface diffuseness parameter

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Reaction mechanisms in massive nuclei collisions and perspectives for synthesis of heavier superheavy elements

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Nuclear Science and Techniques 2013年第5期24卷 98-106页

作者： gIARDINA g NASIROV A K mandaglio g CURCIARELLO F De LEO V FAZIO g ROMANIUK M Dipartimento di Fisica e di Scienze della Terra dell'Università di Messina Istituto Nazionale di Fisica Nucleare Sezione di Catania Joint Institute for Nuclear Research Institute of Nuclear Physics Centro Siciliano di Fisica Nucleare e Struttura della Materia Catania 95125Italy

We discuss a hardship in synthesis of heaviest super heavy elements in massive nuclei reactions due to the hindrance to complete fusion of reacting nuclei caused on the onset of quasifission process which strongly competes with complete fusion and due to the strong increase of fission yields along the de-excitation cascade of the compound nucleus in comparison with the evaporation residue *** hindrance to formation of compound nucleus and evaporation residue is determined by the characteristic of the entrance channel.

关键词：超重元素反应机制合成碰撞聚变反应残余物复合核核反应

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Latest results from gRAAL collaboration

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Chinese Physics C 2009年第12期33卷 1249-1253页

作者： V. Vegna V. Bellini J.P. Bouquet L. Casano A. D'Angelo J.P. Didelez R. Di Salvo A. Fantini D. Franco g. gervino F. ghio g. giardina B. girolami A. giusa M. guidal E. Hourany A.S. Ignatov R. Kunnel A. Lapik A. Lleres P. Levi Sandri F. Mammoliti g. mandaglio M. Manganaro M. Moricciani A.N. Mushkarenkov V.g. Nedorezov C. Randieri D. Rebreyend N.V. Rudnev g. Russo C. Schaerf M.L. Sperduto M.C. Sutera A.Turinge Dip. di Fisica Università degli Studi di Roma 'Tor Vergata' via della Ricerca Scientifica 1 I-00133 Roma Italy INFN - Sezione di Roma 'Tor Vergata' via della Ricerca Scientifica 1 I-00133 Roma Italy Dip. di Fisica e Astronomia Università di Catania via Santa Sofia 44 I-95123 Catania Italy INFN - Sezione di Catania via Santa Sofia 44 I-95123 Catania Italy LPSC Universit Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble 53 Avenue des Martyres 38026 Grenoble France IPNO Universit de Paris-Sud 11 CNRS/IN2P3 15 rue Georges Clemenceau 91406 Orsay France Dip. di Fisica Sperimentale Università di Torino via P.Giuria I-00125 Torino Italy INFN - Sezione di Torino via P.Giuria I-00125 Torino Italy Istituto Superiore di Sanità viale Regina Elena 299 I-00161 Roma Italy INFN - Sezione di Roma piazzale Aldo Moro 2 I-00185 Roma Italy Dip. di Fisica Universitàdi Messina salita Sperone 31 I-98166 Messina Italy Institute for Nuclear Research RAS 117312 Moscow Russia INFN - Laboratori Nazionali di Frascati via E.Fermi 40 I-00044 Frascati Italy INFN - Sezione di Catania via Santa Sofia 44 I-95123 Catania Italy

The gRAAL experimental set-up consists of a polarized and tagged photon beam that covers an energy range from a minimum of 600 MeV up to a maximum of 1500 MeV, of a liquid Hydrogen or Deuterium target and of the 4π Lagrange detector optimized for photon detection. It allows the study of pseudo-scalar and vector meson photoproduCtion on the nucleon in the energy range corresponding to the second and the third resonance regions. In the following, the ∑ beam asymmetries in η and π0 photoproduction on quasi-free nucleon are shown. Also single and double polarization observables in K＋A photoproduction on free proton are shown; they are important to confirm the role of new or poorly known resonances in the 1900 MeV mass region.

关键词： polarized photon meson photoproduction polarization observables

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