172 citations · 2.2k across the 119 of their papers we have counts for
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Deformations of the Boson Representation and its Subalgebras
J. P. Draayer, A. I. Georgieva, M. I. Ivanov
The boson representation of the sp(4,R) algebra and two distinct deformations of it, are considered, as well as the compact and noncompact subalgebras of each. The initial as well…
Shell Model Description of Gd
G. Popa, J. P. Draayer, J. G. Hirsch
The pseudo-SU(3) model is used to describe the low-energy spectra as well as and transition strengths in Gd. The Hamiltonian includes spherical single-particle en…
Pseudo SU(3) shell model: Normal parity bands in odd-mass nuclei
C. E. Vargas, J. G. Hirsch, J. P. Draayer
A pseudo shell SU(3) model description of normal parity bands in 159-Tb is presented. The Hamiltonian includes spherical Nilsson single-particle energies, the quadrupole-quadrupole…
Quasi-SU(3) truncation scheme for even-even sd-shell nuclei
C. E. Vargas, J. G. Hirsch, J. P. Draayer
The Quasi-SU(3) symmetry was uncovered in full pf and sdg shell-model calculations for both even-even and odd-even nuclei. It manifests itself through a dominance of single-particl…
SU(3) symmetry breaking in lower fp-shell nuclei
V. G. Gueorguiev, J. P. Draayer, C. W. Johnson
Results of shell-model calculations for lower fp-shell nuclei show that SU(3) symmetry breaking in this region is driven by the single-particle spin-orbit splitting. However, even…
Solitons and wavelets: Scale analysis and bases
A. Ludu, R. F. O'Connell, J. P. Draayer
We use a one-scale similarity analysis which gives specific relations between the velocity, amplitude and width of localized solutions of nonlinear differential equations, whose ex…