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An asset allocation strategy for risk reserve considering both risk and profit
Dynamical nucleus-nucleus potential and incompressibility of nuclear matter
The dynamical nucleus-nucleus potentials for some fusion reactions are
investigated by using the improved quantum molecular dynamics (ImQMD) model
with different sets of parameters in which the corresponding incompressibility
coefficient of nuclear matter is different. Two new sets of parameters SKP* and
IQ3 for the ImQMD model are proposed with the incompressibility coefficient of
195 and 225 MeV, respectively. The measured fusion excitation function for
16O+208Pb and the charge distribution of fragments for Ca+Ca and Au+Au in
multi-fragmentation process can be reasonably well reproduced. Simultaneously,
the influence of the nuclear matter incompressibility and the range of
nucleon-nucleon interaction on the nucleus-nucleus dynamic potential is
investigated.Comment: 7 figures, 3 tables, to appear in Phys. Rev.
Diameter dependence of SiGe nanowire thermal conductivity
We theoretically compute the thermal conductivity of SiGe alloy nanowires as
a function of nanowire diameter, alloy concentration, and temperature,
obtaining a satisfactory quantitative agreement with experimental results. Our
results account for the weaker diameter dependence of the thermal conductivity
recently observed in SiGe nanowires (), as compared to pure
Si nanowires. We also present calculations in the full range of alloy
concentrations, , which may serve as a basis for comparison
with future experiments on high alloy concentration nanowires.Comment: 3 fig
Azimuthal asymmetry in transverse energy flow in nuclear collisions at high energies
The azimuthal pattern of transverse energy flow in nuclear collisions at RHIC
and LHC energies is considered. We show that the probability distribution of
the event-by-event azimuthal disbalance in transverse energy flow is
essentially sensitive to the presence of the semihard minijet component.Comment: 6 pages, 2 figure
Optical properties of TlNi2Se2: Observation of pseudogap formation
The quasi-two-dimensional nickel chalcogenides is a newly
discovered superconductor. We have performed optical spectroscopy study on
single crystals over a broad frequency range at various
temperatures. The overall optical reflectance spectra are similar to those
observed in its isostructure . Both the suppression in
and the peaklike feature in suggest the progressive
formation of a pseudogap feature in the midinfrared range with decreasing
temperatures, which might be originated from the dynamic local fluctuation of
charge-density-wave (CDW) instability. We propose that the CDW instability in
is driven by the saddle points mechanism, due to the existence of
van Hove singularity very close to the Fermi energy.Comment: 5 pages, 4 figure
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