26,000 research outputs found
Microscopic Description of Nuclear Fission Dynamics
We discuss possible avenues to study fission dynamics starting from a
time-dependent mean-field approach. Previous attempts to study fission dynamics
using the time-dependent Hartree-Fock (TDHF) theory are analyzed. We argue that
different initial conditions may be needed to describe fission dynamics
depending on the specifics of the fission phenomenon and propose various
approaches towards this goal. In particular, we provide preliminary
calculations for studying fission following a heavy-ion reaction using TDHF
with a density contraint. Regarding prompt muon-induced fission, we also
suggest a new approach for combining the time-evolution of the muonic wave
function with a microscopic treatment of fission dynamics via TDHF
Microscopic Description of Nuclear Fission Dynamics
We discuss possible avenues to study fission dynamics starting from a
time-dependent mean-field approach. Previous attempts to study fission dynamics
using the time-dependent Hartree-Fock (TDHF) theory are analyzed. We argue that
different initial conditions may be needed to describe fission dynamics
depending on the specifics of the fission phenomenon and propose various
approaches towards this goal. In particular, we provide preliminary
calculations for studying fission following a heavy-ion reaction using TDHF
with a density contraint. Regarding prompt muon-induced fission, we also
suggest a new approach for combining the time-evolution of the muonic wave
function with a microscopic treatment of fission dynamics via TDHF
2D Superconductivity: Classification of Universality Classes by Infinite Symmetry
I consider superconducting condensates which become incompressible in the
infinite gap limit. Classical 2D incompressible fluids possess the dynamical
symmetry of area-preserving diffeomorphisms. I show that the corresponding
infinite dynamical symmetry of 2D superconducting fluids is the coset
, with
the chiral algebra of quantum area-preserving diffeomorphisms
and I derive its minimal models. These define a discrete set of 2D
superconductivity universality classes which fall into two main categories:
conventional superconductors with their vortex excitations and unconventional
superconductors. These are characterized by a broken symmetry and are labeled by an integer level . They
possess neutral spinon excitations of fractional spin and statistics which carry also an isospin
quantum number; this hidden symmetry implies that these anyon
excitations are non-Abelian. The simplest unconventional superconductor is
realized for : in this case the spinon excitations are semions
(half-fermions). My results show that spin-charge separation in 2D
superconductivity is a universal consequence of the infinite symmetry of the
ground state. This infinite symmetry and its superselection rules realize a
quantum protectorate in which the neutral spinons can survive even as soft
modes on a rigid, spinless charge condensate.Comment: Revised version to appear in Nuclear Physics
The Novel ''Controlled Intermediate Nuclear Fusion'' and its Possible Industrial Realization as Predicted by Hadronic Mechanics and Chemistry
In this note, we propose, apparently for the first time, a new type of
controlled nuclear fusion called "intermediate" because occurring at energies
intermediate between those of the ''cold'' and ''hot'' fusions, and propose a
specific industrial realization. For this purpose: 1) We show that known
limitations of quantum mechanics, quantum chemistry and special relativity
cause excessive departures from the conditions occurring for all controlled
fusions; 2) We outline the covering hadronic mechanics, hadronic chemistry and
isorelativity specifically conceived, constructed and verified during the past
two decades for new cleans energies and fuels; 3) We identify seven physical
laws predicted by the latter disciplines that have to be verified by all
controlled nuclear fusions to occur; 4) We review the industrial research
conducted to date in the selection of the most promising engineering
realization as well as optimization of said seven laws; and 5) We propose with
construction details a specific {\it hadronic reactor} (patented and
international patents pending), consisting of actual equipment specifically
intended for the possible industrial production of the clean energy released by
representative cases of controlled intermediate fusions for independent
scrutiny by interested colleagues.Comment: 32 pages, 5 figures. Journal of Applied Sciences, in pres
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