1,542 research outputs found
Effects of a wavy neutral sheet on cosmic ray anisotropies
The first results of a three-dimensional numerical code calculating cosmic ray anisotropies is presented. The code includes diffusion, convection, adiabatic cooling, and drift in an interplanetary magnetic field model containing a wavy neutral sheet. The 3-D model can reproduce all the principal observations for a reasonable set of parameters
The H-Line Signed Graph of a Signed Graph
For standard terminology and notion in graph theory we refer the reader to Harary; the non-standard will be given in this paper as and when required. We treat only finite simple graphs without self loops and isolates
SU(N) Wigner-Racah algebra for the matrix of second moments of embedded Gaussian unitary ensemble of random matrices
Recently Pluhar and Weidenmueller [Ann. Phys. (N.Y.) Vol 297, 344 (2002)]
showed that the eigenvectors of the matrix of second moments of embedded
Gaussian unitary ensemble of random matrices generated by k-body interactions
(EGUE(k)) for m fermions in N single particle states are SU(N) Wigner
coefficients and derived also an expression for the eigenvalues. Going beyond
this work, we will show that the eigenvalues of this matrix are square of a
SU(N) Racah coefficient and thus the matrix of second moments of EGUE(k) is
solved completely by SU(N) Wigner-Racah algebra.Comment: 16 page
Shell model and deformed shell model spectroscopy of Ga
In the present work we have reported comprehensive analysis of recently
available experimental data [H.M. David et al., Phys. Lett. B {\bf 726}, 665
(2013)] for high-spin states up to with in the odd-odd
nucleus Ga using shell model calculations within the full
model space and deformed shell model based on Hartee-Fock
intrinsic states in the same space. The calculations have been performed using
jj44b effective interaction developed recently by B.A. Brown and A.F. Lisetskiy
for this model space. The results obtained with the two models are similar and
they are in reasonable agreement with experimental data. In addition to the
and energy bands, band crossings and electromagnetic transition
probabilities, we have also calculated the pairing energy in shell model and
all these compare well with the available theoretical results.Comment: 9 pages, 4 figure
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