Effects of the density-dependent weak form factors on the neutrino reaction via neutral current for the nucleon in nuclear matter and ¹²C Physical Review C, 2013; 87(6) 3. The right to use all or part of the Article, including the APS-prepared version without revision or modification, on the author(s)' web home page or employer's website and to make copies of all or part of the Article, including the APS-prepared version without revision or modification, for the author(s)' and/or the employer's use for educational or research purposes.": February 2014PHYSICAL REVIEW C 87, 065502 (2013) Effects of the density-dependent weak form factors on the neutrino reaction via neutral current for the nucleon in nuclear matter and 12 C The nucleon form factors in free space are usually thought to be modified when a nucleon is bound in a nucleus or immersed in a nuclear medium. We investigate effects of the density-dependent axial and weak-vector form factors on the electroneutrino (ν e ) and anti-electroneutrino (ν e ) reactions with incident energy E ν 80 MeV via neutral current (NC) for a nucleon in a nuclear medium or 12 C. For the density-dependent form factors, we exploit the quark-meson-coupling (QMC) model, and apply them to the ν e andν e induced reactions by NC. About 12% decrease of the total cross section by the ν e reaction on the nucleon is obtained at normal density, ρ = ρ 0 ∼ 0.15 fm −3 , as well as about 18% reduction of the total ν e cross section on 12 C, by the modification of the weak form factors of the bound nucleon. However, similarly to the charged current reaction, effects of the nucleon property change in theν e reaction reduce significantly the cross sections about 30% for the nucleon in matter and 12 C cases. Such a large asymmetry in theν e cross sections is addressed to originate from the different helicities ofν e and ν e .
We discuss the role of two-neutron transfer processes in the fusion reaction of the 9,11 Li + 208 Pb systems. We first analyze the 9 Li + 208 Pb reaction by taking into account the coupling to the 7 Li + 210 Pb channel. To this end, we assume that two neutrons are directly transferred to a single effective channel in 210 Pb and solve the coupled-channels equations with the two channels. By adjusting the coupling strength and the effective Q-value, we successfully reproduce the experimental fusion cross sections for this system. We then analyze the 11 Li + 208 Pb reaction in a similar manner, that is, by taking into account three effective channels with 11 Li + 208 Pb, 9 Li + 210 Pb, and 7 Li + 212 Pb partitions. In order to take into account the halo structure of the 11 Li nucleus, we construct the potential between 11 Li and 208 Pb with a double folding procedure, while we employ a Wood-Saxon type potential with the global Akyüz-Winther parameters for the other channels. Our calculation indicates that the multiple two-neutron transfer process plays a crucial role in the 11 Li + 208 Pb fusion reaction at energies around the Coulomb barrier. 25.70.Jj
The ionized cluster beam deposition of Al and Cu clusters has been investigated with a classical molecular dynamics simulation and the Metropolis Monte–Carlo simulation. The spreading of the cluster has been studied as functions of cluster size and initial cluster energy. When the local area reached the local melting spot on the surface around the impact point of an energetic cluster, during a few ps, intermixing was easily achieved and a good epitaxial film with optimum bulk density was formed. For uniform film growth using a cluster impact, it is necessary to make the local area temperature higher than melting temperature on the surface around the impact point of an energetic cluster.
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