The differential cross section, dσ/dt, for ρ 0 meson photoproduction on the proton above the reso... more The differential cross section, dσ/dt, for ρ 0 meson photoproduction on the proton above the resonance region was measured up to a momentum transfer -t = 5 GeV 2 using the CLAS detector at the Thomas Jefferson National Accelerator ...
The spin structure functions $g_1$ for the proton and the deuteron have been measured over a wide... more The spin structure functions $g_1$ for the proton and the deuteron have been measured over a wide kinematic range in $x$ and \Q2 using 1.6 and 5.7 GeV longitudinally polarized electrons incident upon polarized NH$_3$ and ND$_3$ targets at Jefferson Lab. Scattered ...
Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual ... more Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to quark versus pion degrees of freedom occurs through the Q 2 ...
Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual ... more Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to quark versus pion degrees of freedom occurs through the Q 2 ...
The results of an experiment on inclusive electron scattering from an oxygen jet target, performe... more The results of an experiment on inclusive electron scattering from an oxygen jet target, performed in a wide range of energy and momentum transfer covering both quasi-elastic and �(1232) resonance regions, are reported. In the former region the theoretical predictions, obtained including effects of nucleon-nucleon correlations in both initial and final states, give a good description of the experimental data.
The neutron multiplication factor k-eff is a key quantity to characterize subcritical neutron mul... more The neutron multiplication factor k-eff is a key quantity to characterize subcritical neutron multiplying devices and for understanting their physical behaviour, being related to the fundamental eigenvalue of Boltzmann transport equation. Both the maximum available power-and all quantities related to it, like, e.g. the effectiveness in burning nuclear wastes-as well as reactor kinetics and dynamics depend on k-eff. Nevertheless , k-eff is not directly measurable and its determination results from the solution of an inverse problem: minimizing model dependence of the solution for k-eff then becomes a critical issue, relevant both for practical and theoretical reasons.
In this work we report initial studies on a low power Accelerator-Driven System as a possible exp... more In this work we report initial studies on a low power Accelerator-Driven System as a possible experimental facility for the measurement of relevant integral nuclear quantities. In particular, we performed Monte Carlo simulations of minor actinides and fission products irradiation and estimated the fission rate within fission chambers in the reactor core and the reflector, in order to evaluate the transmutation rates and the measurement sensitivity. We also performed a photo-peak analysis of available experimental data from a research reactor, in order to estimate the expected sensitivity of this analysis method on the irradiation of samples in the ADS considered.
The differential cross section, dσ/dt, for ρ 0 meson photoproduction on the proton above the reso... more The differential cross section, dσ/dt, for ρ 0 meson photoproduction on the proton above the resonance region was measured up to a momentum transfer -t = 5 GeV 2 using the CLAS detector at the Thomas Jefferson National Accelerator ...
The spin structure functions $g_1$ for the proton and the deuteron have been measured over a wide... more The spin structure functions $g_1$ for the proton and the deuteron have been measured over a wide kinematic range in $x$ and \Q2 using 1.6 and 5.7 GeV longitudinally polarized electrons incident upon polarized NH$_3$ and ND$_3$ targets at Jefferson Lab. Scattered ...
Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual ... more Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to quark versus pion degrees of freedom occurs through the Q 2 ...
Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual ... more Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to quark versus pion degrees of freedom occurs through the Q 2 ...
The results of an experiment on inclusive electron scattering from an oxygen jet target, performe... more The results of an experiment on inclusive electron scattering from an oxygen jet target, performed in a wide range of energy and momentum transfer covering both quasi-elastic and �(1232) resonance regions, are reported. In the former region the theoretical predictions, obtained including effects of nucleon-nucleon correlations in both initial and final states, give a good description of the experimental data.
The neutron multiplication factor k-eff is a key quantity to characterize subcritical neutron mul... more The neutron multiplication factor k-eff is a key quantity to characterize subcritical neutron multiplying devices and for understanting their physical behaviour, being related to the fundamental eigenvalue of Boltzmann transport equation. Both the maximum available power-and all quantities related to it, like, e.g. the effectiveness in burning nuclear wastes-as well as reactor kinetics and dynamics depend on k-eff. Nevertheless , k-eff is not directly measurable and its determination results from the solution of an inverse problem: minimizing model dependence of the solution for k-eff then becomes a critical issue, relevant both for practical and theoretical reasons.
In this work we report initial studies on a low power Accelerator-Driven System as a possible exp... more In this work we report initial studies on a low power Accelerator-Driven System as a possible experimental facility for the measurement of relevant integral nuclear quantities. In particular, we performed Monte Carlo simulations of minor actinides and fission products irradiation and estimated the fission rate within fission chambers in the reactor core and the reflector, in order to evaluate the transmutation rates and the measurement sensitivity. We also performed a photo-peak analysis of available experimental data from a research reactor, in order to estimate the expected sensitivity of this analysis method on the irradiation of samples in the ADS considered.
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Papers by Marco Ripani