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Research Interests: Physics, Atomic Physics, Nuclear Fusion, Asymmetry, Dipole, and 5 moreIon, Projectile, High energy, Heavy Ions, and Excitation
Very exotic shapes can be assumed for the nuclei at high angular momenta. Their study has become possible with the advent of the last generation high-resolution γ-ray spectrometers. In this talk results are presented on superdeformed... more
Very exotic shapes can be assumed for the nuclei at high angular momenta. Their study has become possible with the advent of the last generation high-resolution γ-ray spectrometers. In this talk results are presented on superdeformed nuclei of theA=140 mass region where a detailed spectroscopy in the second minimum is now possible. Hyperdeformed rotational bands, expected in the third minimum, lie at even higher spins where their observation is very difficult from the experimental point of view. We have up to now only weak signals of their presence. The status of the search for hyperdeformation in152Dy is reported.
Research Interests: Physics and Spectrometer
Systems of intermediate fissility are characterized by an evaporation residues cross section comparable or larger than the fission cross section, and by a relatively higher probability for charged particle emission in the pre-scission... more
Systems of intermediate fissility are characterized by an evaporation residues cross section comparable or larger than the fission cross section, and by a relatively higher probability for charged particle emission in the pre-scission channel. In a theoretical framework in which time scale estimates of the fission process rely on statistical model calculations, the analysis of particle emission in the evaporation
Research Interests: Physics, Evaporation, Stochastic analysis, Dynamic Analysis, Langevin Dynamics, and 13 moreCross Section, Theoretical Framework, Three Dimensional, Stochastic system, Fission, Statistical Model, Dynamic Model of WSN, Particle Acceleration, Transmission Coefficient, Charged Particles, particle emission, dynamic model, and storage ring
... di Napoli Federico II and INFN, Sezione di Napoli, 80126 Napoli, Italy R. MORDENTE Dipartimento di Scienze Fisiche, Universita' di Napoli Federico II and INFN, Sezione di Napoli, 80126 Napoli, Italy M. CINAUSERO Laboratori... more
... di Napoli Federico II and INFN, Sezione di Napoli, 80126 Napoli, Italy R. MORDENTE Dipartimento di Scienze Fisiche, Universita' di Napoli Federico II and INFN, Sezione di Napoli, 80126 Napoli, Italy M. CINAUSERO Laboratori Nazionali di Legnaro, Viale dell'Universita ...
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ABSTRACT
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ABSTRACT
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Systems of intermediate fissility are characterized by an evaporation residues (ER) cross section comparable or larger than the fission cross section, and by a relatively higher probability for charged particle emission in the... more
Systems of intermediate fissility are characterized by an evaporation residues (ER) cross section comparable or larger than the fission cross section, and by a relatively higher probability for charged particle emission in the pre-scission channel. In a theoretical framework in which time scale estimates of the fission process rely on statistical model calculations, the analysis of particle emission in the
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The detection of hidden explosives by using nuclear techniques has been pursued by the EXPLODET Collaboration during the last years. The aim of the Collaboration was to verify the possibility of applying new tools and methodologies in... more
The detection of hidden explosives by using nuclear techniques has been pursued by the EXPLODET Collaboration during the last years. The aim of the Collaboration was to verify the possibility of applying new tools and methodologies in Humanitarian De-mining. Results so far obtained are presented and discussed looking also to possible application in other fields.
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A 4pi detection system sensitive to light charged particles is fully operational at the Laboratori Nazionali di Legnaro (LNL) since the end of 1998. The apparatus, called 8piLP, is dedicated to the study of the reaction mechanisms in... more
A 4pi detection system sensitive to light charged particles is fully operational at the Laboratori Nazionali di Legnaro (LNL) since the end of 1998. The apparatus, called 8piLP, is dedicated to the study of the reaction mechanisms in heavy ion collisions at energies up to 20 AMeV. The system is a telescope array based on DeltaE-E, Time of Flight and
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ABSTRACT In the context or the design of an intense source of low and intermediate energy, neutrons, the angular and energy distributions of neutrons produced in the interaction of 90 MeV protons in a C-12 target, in which the protons are... more
ABSTRACT In the context or the design of an intense source of low and intermediate energy, neutrons, the angular and energy distributions of neutrons produced in the interaction of 90 MeV protons in a C-12 target, in which the protons are stopped, have been measured by time-of-flight and activation techniques, As compared to C-12 the yield is less than a factor two higher, while it is somewhat less than for a Be-9 target.
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1 INFN Laboratori Nazionali di Legnaro (Padova), Italy. 2 Dipartimento di Ingegneria Meccanica, Università di Padova (Padova), Italy. 3 INFN Sezione di Pavia (Pavia), Italy. 4 INFN Sezione di Milano (Milano), Italy. 5 INFN Sezione di... more
1 INFN Laboratori Nazionali di Legnaro (Padova), Italy. 2 Dipartimento di Ingegneria Meccanica, Università di Padova (Padova), Italy. 3 INFN Sezione di Pavia (Pavia), Italy. 4 INFN Sezione di Milano (Milano), Italy. 5 INFN Sezione di Bologna (Bologna), Italy. 6 Dipartimento di Ingegneria Meccanica, Università di Trento (Trento), Italy. 7 Dipartimento di Scienze Chimiche, Università di Padova, Padova, Italy.
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SPES (Selective Production of Exotic Species) is a project focused on the development of a Radioactive Ion Beam facility at National Institute of Nuclear Physics (Legnaro, Padua, Italy). As exposed by Andrighetto et al [1], the SPES... more
SPES (Selective Production of Exotic Species) is a project focused on the development of a Radioactive Ion Beam facility at National Institute of Nuclear Physics (Legnaro, Padua, Italy). As exposed by Andrighetto et al [1], the SPES facility is oriented to the production of intense neutron-rich RIBs according to the isotope separation on line (ISOL) technique. In an ISOL facility the pulsing core is constituted by the production target and the ion source, that working in series are able to convert a stable proton beam in a RIB. The surface ion source adopted for the SPES facility is at present the standard MK1 surface ion source developed and used at the ISOLDE facility (CERN, Switzerland); it is composed of a Tungsten (W) tubular ionizing cavity (length, external diameter and internal diameter equal to 34, 5 and 3.1 mm, respectively) connected on one side to a Tantalum (Ta) support (see figure 1) and on the other one to the Ta transfer line by means of a Ta connector (the transfer line is a Ta tube that allows the passage of the radioactive isotopes from the target to the ion source); behind the Ta support a Ta screen is positioned.
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Abstract The ALICE silicon pixel detector (SPD) comprises the two innermost layers of the ALICE inner tracker system. The SPD includes 120 half staves each consisting of 10 ALICE pixel chips bump bonded to two silicon sensors and one... more
Abstract The ALICE silicon pixel detector (SPD) comprises the two innermost layers of the ALICE inner tracker system. The SPD includes 120 half staves each consisting of 10 ALICE pixel chips bump bonded to two silicon sensors and one multi-chip read-out module. Each pixel chip ...
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The ALICE Inner Tracking System (ITS) [1] includes three different types of silicon detectors: pixels, drifts and strips. The ALICE Silicon Pixel Detector (SPD) forms the two innermost layers of the ITS. The ITS will provide precise... more
The ALICE Inner Tracking System (ITS) [1] includes three different types of silicon detectors: pixels, drifts and strips. The ALICE Silicon Pixel Detector (SPD) forms the two innermost layers of the ITS. The ITS will provide precise tracking information close to the interaction point, ...
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... Original English Text Copyright c 2003 by Rubchenya, Alexandrov, Khlebnikov, Lyapin, Maslov, Penionzhkevich, Prete, Pyatkov, Sobolev, Tiourin, Trzaska, Vakhtin, Äystö. ... The full α-particlestatistics collected from all LCP detectors... more
... Original English Text Copyright c 2003 by Rubchenya, Alexandrov, Khlebnikov, Lyapin, Maslov, Penionzhkevich, Prete, Pyatkov, Sobolev, Tiourin, Trzaska, Vakhtin, Äystö. ... The full α-particlestatistics collected from all LCP detectors in coincidence with fragments was about 6000 ...
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A detailed comparison between measured energy spectra and cross sections of 1,2,3H and 4He, evaporated from the composite system 96Ru (E*~=113 MeV), and the predictions of the statistical model, has been carried out. Results obtained with... more
A detailed comparison between measured energy spectra and cross sections of 1,2,3H and 4He, evaporated from the composite system 96Ru (E*~=113 MeV), and the predictions of the statistical model, has been carried out. Results obtained with transmission coefficients derived from optical model (OM), ingoing-wave boundary-condition model (IWBCM) and fusion systematics (FS) are presented. The best overall description of the data
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The heat capacities and the dynamics of hot medium mass nuclei have been explored by studies of light particle emission. The variation in heat capacity with temperature, expressed in terms of an effective Fermi gas level density parameter... more
The heat capacities and the dynamics of hot medium mass nuclei have been explored by studies of light particle emission. The variation in heat capacity with temperature, expressed in terms of an effective Fermi gas level density parameter appropriate to the statistical description of nuclear de-excitation, corresponds to a decrease in a from A/8 to A/13 as the excitation energy increases from 1 to 2 MeV/nucleon. This result is compared to recent theoretical predictions. An apparent sudden change in the heat capacity observed at slightly higher excitation energies per nucleon is also discussed. Prescission and post-scission particle multiplicities and temperatures in coincidence with evaporation residues and fission fragments provide further information on the decay dynamics of hot nuclei. Possible means of isolating presaddle emission and of determining the temperature dependence of the fission barrier are discussed.
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A focal-plane detector for a recoil-mass spectrometer has been developed. It consists of a 14 × 14 cm2 position-sensitive parallel-plate avalanche counter backed by a 43 cm long Bragg chamber. Both detectors work in the same gas volume... more
A focal-plane detector for a recoil-mass spectrometer has been developed. It consists of a 14 × 14 cm2 position-sensitive parallel-plate avalanche counter backed by a 43 cm long Bragg chamber. Both detectors work in the same gas volume thus reducing the dead layers. The intrinsic resolution of the position detector is +/-0.5 mm, and an overall timing resolution of 660 ps FWHM was measured with 5.5 MeV alpha-particles. The Bragg chamber allows the identification of elements with energy high enough to overcome the Bragg peak: in all cases it allows the separation between the reaction channels and the beam scattering. The detector has already been used with a good reliability in a variety of transfer and fusion experiments at the LNL Recoil Mass Spectrometer.
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ABSTRACT A new microstructure, anode-point based, for the detection of gas ionizing radiations and some preliminary results are presented. For every single detected ionizing radiation it gives a pair of “induced” charges of the same... more
ABSTRACT A new microstructure, anode-point based, for the detection of gas ionizing radiations and some preliminary results are presented. For every single detected ionizing radiation it gives a pair of “induced” charges of the same amount (pulses of the same amplitudes), of opposite sign, with the same collection time and essentially in time coincidence, that are proportional to the primary ionization collected. Gas multiplication more than 106 with more than 108 electrons in the primary avalanches, working in the proportional region, are possible in 760Torr of isobutane gas. The complete lack of insulating materials in the active volume of this microstructure avoids problems of charging-up and makes stable and repeatable its behaviour. Single electrons emitted by a heated filament (Ec
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A 4π detection system sensitive to light charged particles is being developed at the Laboratori Nazionali di Legnaro (LNL) for the study of the reaction mechanisms produced in heavy ion collisions at energies up to 20 AMeV. The 8πLP... more
A 4π detection system sensitive to light charged particles is being developed at the Laboratori Nazionali di Legnaro (LNL) for the study of the reaction mechanisms produced in heavy ion collisions at energies up to 20 AMeV. The 8πLP apparatus is a telescope assembly characterized by large solid angle (90% of 4π) and high granularity (262 modules). Particle identification at
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D. Elia ∗∗), GE Bruno, M. Caselle, RA Fini, V. Lenti, V. Manzari, V. Paticchio, R. Santoro Dipartimento IA di Fisica dell'Universit`a and INFN, Bari, Italy ... G. Anelli, M. Burns, IA Cali, M. Campbell, S. Ceresa, P.... more
D. Elia ∗∗), GE Bruno, M. Caselle, RA Fini, V. Lenti, V. Manzari, V. Paticchio, R. Santoro Dipartimento IA di Fisica dell'Universit`a and INFN, Bari, Italy ... G. Anelli, M. Burns, IA Cali, M. Campbell, S. Ceresa, P. Chochula, J. Conrad, S. Kapusta, A. Kluge, M. Morel, P. Nilsson, F. Osmic, ...
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SPES (Selective Production of Exotic Species) is an INFN project to develop a Radioactive Ion Beam (RIB) facility as an intermediate step toward EURISOL. The key feature of SPES is to provide high intensity and high-quality beams of... more
SPES (Selective Production of Exotic Species) is an INFN project to develop a Radioactive Ion Beam (RIB) facility as an intermediate step toward EURISOL. The key feature of SPES is to provide high intensity and high-quality beams of neutron rich nuclei to perform forefront research in nuclear structure, reaction dynamics and interdisciplinary fields like medical, biological and material sciences. The exotic isotopes will be reaccelerated by the ALPI Superconducting Linac at energies of 11 AMeV for masses in the region of A=130 amu with an expected rate on target of 109 pps. This represent a substantial improvement to the actual available ISOL facilities both from the point of view of intensity and energy of the exotic beam.
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SPES (Selective Production of Exotic Species) is an INFN project whose aim is the realization of a RIB (Radioactive Ion Beam facility) as an intermediate step toward EURISOL. The site selected for SPES is Legnaro National Laboratory... more
SPES (Selective Production of Exotic Species) is an INFN project whose aim is the realization of a RIB (Radioactive Ion Beam facility) as an intermediate step toward EURISOL. The site selected for SPES is Legnaro National Laboratory (LNL), in the north-east region of Italy. The main reason for the site selection is the availability at LNL of the superconducting Linac ALPI, which will be used as re-accelerator of neutron-rich nuclei with mass in the range 80-160 to an energy of 8÷13 MeV/u. The schedule of SPES project foresees the beginning of building construction in 2010 and the completion of the facility by the end of 2014. We report a preliminary analysis on control system requirements for safety applications.