2,528 research outputs found
On the nuclear symmetry energy and the neutron skin in neutron-rich nuclei
The symmetry energy for nuclear matter and its relation to the neutron skin
in finite nuclei is discussed. The symmetry energy as a function of density
obtained in a self-consistent Green function approach is presented and compared
to the results of other recent theoretical approaches. A partial explanation of
the linear relation between the symmetry energy and the neutron skin is
proposed. The potential of several experimental methods to extract the neutron
skin is examined.Comment: to appear in Phys. Rev.
E1 transitions between spin-dipole and Gamow-Teller giant resonances
The branching ratios for E1 transitions between the spin-dipole (SD) and
Gamow-Teller (GT) giant resonances in Nb and Pb are evaluated.
Assuming the main GT-state has the wave function close to that for the "ideal"
GT-state, we reduced the problem to calculate the SD and GT strength functions.
These strength functions are evaluated within an extended continuum-RPA
approach.Comment: 8 pages, submitted to Phys. Rev.
Nuclear Structure Aspects of the Neutrinoless Double Beta Decay
In this article, we analyze some nuclear structure aspects of the
neutrinoless double beta decay nuclear matrix elements (NME), in the framework
of the Interacting Shell Model. We give results for the decays of 48Ca, 76Ge,
82Se, 124Sn, 128Te, 130Te, and 136Xe, using improved effective interactions and
valence spaces. We examine the dependence of the NME's on the effective
interaction and the valence space, and analyze the effects of the short range
correlations and the finite size of the nucleon. Finally we study the influence
of the deformation on the values of the NME's.Comment: To appear in EJP-
Hamiltonian formalism of the Landau-Lifschitz equation for a spin chain with full anisotropy
The Hamiltonian formalism of the Landau-Lifschitz equation for a spin chain
with full anisotropy is formulated completely, which constructs a stable base
for further investigations.Comment: 11page
On stochastic switching of bistable resonant-tunneling structures via nucleation
We estimate the critical size of the initial nucleus of the low current state
in a bistable resonant tunneling structure which is needed for this nucleus to
develop into a lateral switching front. Using the results obtained for
deterministic switching fronts, we argue that for realistic structural
parameters the critical nucleus has macroscopic dimensions and therefore is too
large to be created by stochastic electron noise.Comment: the extended version of the Comment on "Lifetime of metastable states
in resonant-tunneling structures" to appear in Phys. Rev.
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