The Efimov trimers in excited 12C nuclei, which no observation exists yet, are discussed by means... more The Efimov trimers in excited 12C nuclei, which no observation exists yet, are discussed by means of analyzing the experimental data of 70(64)Zn(64Ni) +70(64)Zn(64Ni )reactions at beam energy of E/A=35 MeV/nucleon. In heavy ion collisions, the αs interact with each other and can form complex systems such as 8Be and 12C. For the 3α systems, multi resonance processes give rise to excited levels of 12C. The interaction between any two of the 3α particles provides events with one, two or three 8Be. Their interfering levels are clearly seen in the minimum relative energy distributions. Events of three couple αrelative energies consistent with the ground state of 8Be are observed with the decreasing of the instrumental error at the reconstructed 7.458 MeV excitation energy of 12C, which was suggested as the (Thomas) Efimov state.
Thomson Spectrometers are of primary importance in the discrimination of particles produced by la... more Thomson Spectrometers are of primary importance in the discrimination of particles produced by laser-plasma interaction, according to their energy and charge-mass ratio. We describe here a detailed study on a set of Thomson Spectrometers, adaptable to different experimental situations, with the aim of being placed directly within the experimental chamber, rather than in additional extensions, in order to increase the solid angle of observation. These instruments are suitable for detection of low-medium energy particles and can be effectively employed in laser-plasma experiments of 11B(p,α)8Be fusion. They are provided with permanent magnets, have small dimensions and compact design. In these small configurations electric and magnetic fringing fields play a primary role for particle deflection, and their accurate characterization is required. It was accomplished by means of COMSOL electromagnetic solver coupled to an effective analytical model, very suitable for practical use of the spectrometers. Data from experimental measurements of the magnetic fields have been also used. We describe the application of the spectrometers to an experiment of laser-plasma interaction, coupled to Imaging Plate detectors. Data analysis for spectrum and yield of the detected radiation is discussed in detail.
Symmetric intermediate energy heavy-ion collisions are studied in the Boltzmann-Nordheim-Vlasov t... more Symmetric intermediate energy heavy-ion collisions are studied in the Boltzmann-Nordheim-Vlasov theory, where the collision dynamics is determined by the mean field, the Pauli principle, and the NN scattering cross-sections. Differences between the parallel ensemble and the full ensemble approaches are enumerated. The effect of the model equation of state on the transverse momentum transfer is delineated and shown to be comparable in magnitude to that of the EOS. The mass dependence of the transverse momentum transfer and collective flow angle is discussed.
Fragment yield data, selected with different values of the isospin asymmetry of the quasiprojecti... more Fragment yield data, selected with different values of the isospin asymmetry of the quasiprojectile from 78, 86 Kr +58, 64 Ni reactions at E lab = 35 MeV/nucleon, have been analyzed within the framework of Landau free energy approach. Fits to the free energy data indicated the system to be in the regime of a first-order phase transition. The plot of free energy versus isospin asymmetry of the fragments showed a systematic change with increasing isospin asymmetry of the fragmenting source. This observation demonstrated the role of quasiprojectile isospin asymmetry as an external field which governed the minima positions in the free energy plot. The position of the central minimum was found to be in close agreement with the average isospin asymmetry of the fragments calculated excluding neutrons and protons. Significant deviations from the free energy plot were observed for N = Z fragments, particularly for the lighter ones, which could be corrected after inclusion of odd–even effects...
The first experimental campaign of REVERSE experiment has been performed at Laboratori Nazionali ... more The first experimental campaign of REVERSE experiment has been performed at Laboratori Nazionali del Sud using the forward part of CHIMERA multidetector. Tin projectiles impinging on Nickel targets were studied. Data analysis is in progress, some detectors performances are shown.
ABSTRACT A microcontroller based system has been developed in order to characterize, in real time... more ABSTRACT A microcontroller based system has been developed in order to characterize, in real time, magnetoencephalographic (MEG) signals. The signal are analyzed by using nonlinear data analysis method to extract the dinfin parameter. The signals under consideration are acquired on the whole-head MEG acquisition system and are analyzed in order to characterize spatiotemporal pattern. The microcontroller based implementation represents a low cost stand-alone solution for the analysis of any physiological signals (MEG, EEG, ECG, etc.) suitable for first aid approaches and early diagnostics. The real time feature of the proposed approach could thus allow, in the future, a clinical applications of such methodology
The Efimov trimers in excited 12C nuclei, which no observation exists yet, are discussed by means... more The Efimov trimers in excited 12C nuclei, which no observation exists yet, are discussed by means of analyzing the experimental data of 70(64)Zn(64Ni) +70(64)Zn(64Ni )reactions at beam energy of E/A=35 MeV/nucleon. In heavy ion collisions, the αs interact with each other and can form complex systems such as 8Be and 12C. For the 3α systems, multi resonance processes give rise to excited levels of 12C. The interaction between any two of the 3α particles provides events with one, two or three 8Be. Their interfering levels are clearly seen in the minimum relative energy distributions. Events of three couple αrelative energies consistent with the ground state of 8Be are observed with the decreasing of the instrumental error at the reconstructed 7.458 MeV excitation energy of 12C, which was suggested as the (Thomas) Efimov state.
Thomson Spectrometers are of primary importance in the discrimination of particles produced by la... more Thomson Spectrometers are of primary importance in the discrimination of particles produced by laser-plasma interaction, according to their energy and charge-mass ratio. We describe here a detailed study on a set of Thomson Spectrometers, adaptable to different experimental situations, with the aim of being placed directly within the experimental chamber, rather than in additional extensions, in order to increase the solid angle of observation. These instruments are suitable for detection of low-medium energy particles and can be effectively employed in laser-plasma experiments of 11B(p,α)8Be fusion. They are provided with permanent magnets, have small dimensions and compact design. In these small configurations electric and magnetic fringing fields play a primary role for particle deflection, and their accurate characterization is required. It was accomplished by means of COMSOL electromagnetic solver coupled to an effective analytical model, very suitable for practical use of the spectrometers. Data from experimental measurements of the magnetic fields have been also used. We describe the application of the spectrometers to an experiment of laser-plasma interaction, coupled to Imaging Plate detectors. Data analysis for spectrum and yield of the detected radiation is discussed in detail.
Symmetric intermediate energy heavy-ion collisions are studied in the Boltzmann-Nordheim-Vlasov t... more Symmetric intermediate energy heavy-ion collisions are studied in the Boltzmann-Nordheim-Vlasov theory, where the collision dynamics is determined by the mean field, the Pauli principle, and the NN scattering cross-sections. Differences between the parallel ensemble and the full ensemble approaches are enumerated. The effect of the model equation of state on the transverse momentum transfer is delineated and shown to be comparable in magnitude to that of the EOS. The mass dependence of the transverse momentum transfer and collective flow angle is discussed.
Fragment yield data, selected with different values of the isospin asymmetry of the quasiprojecti... more Fragment yield data, selected with different values of the isospin asymmetry of the quasiprojectile from 78, 86 Kr +58, 64 Ni reactions at E lab = 35 MeV/nucleon, have been analyzed within the framework of Landau free energy approach. Fits to the free energy data indicated the system to be in the regime of a first-order phase transition. The plot of free energy versus isospin asymmetry of the fragments showed a systematic change with increasing isospin asymmetry of the fragmenting source. This observation demonstrated the role of quasiprojectile isospin asymmetry as an external field which governed the minima positions in the free energy plot. The position of the central minimum was found to be in close agreement with the average isospin asymmetry of the fragments calculated excluding neutrons and protons. Significant deviations from the free energy plot were observed for N = Z fragments, particularly for the lighter ones, which could be corrected after inclusion of odd–even effects...
The first experimental campaign of REVERSE experiment has been performed at Laboratori Nazionali ... more The first experimental campaign of REVERSE experiment has been performed at Laboratori Nazionali del Sud using the forward part of CHIMERA multidetector. Tin projectiles impinging on Nickel targets were studied. Data analysis is in progress, some detectors performances are shown.
ABSTRACT A microcontroller based system has been developed in order to characterize, in real time... more ABSTRACT A microcontroller based system has been developed in order to characterize, in real time, magnetoencephalographic (MEG) signals. The signal are analyzed by using nonlinear data analysis method to extract the dinfin parameter. The signals under consideration are acquired on the whole-head MEG acquisition system and are analyzed in order to characterize spatiotemporal pattern. The microcontroller based implementation represents a low cost stand-alone solution for the analysis of any physiological signals (MEG, EEG, ECG, etc.) suitable for first aid approaches and early diagnostics. The real time feature of the proposed approach could thus allow, in the future, a clinical applications of such methodology
The recent and serious crisis in China, Italy and many other countries to follow, due to the Coro... more The recent and serious crisis in China, Italy and many other countries to follow, due to the Coronavirus (or COVID-19), requires a scientific analysis able to clarify and make predictions, that could somehow calm down the public opinion and at the same time give indications to contrast the virus. The goal of this letter is to analyze the problem at hand using modern Chaos theory1 which has been applied successfully to turbulent phenomena2, medical3 and even to financial markets1.
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