145 citations · 2.5k across the 78 of their papers we have counts for
6 papers · 2 filters
Chaos and isospin symmetry breaking in rotational nuclei
J. A. Sheikh, A. T. Kruppa, N. Rowley
For nuclei with N = Z, the isospin degree of freedom is important and, for deformed systems, rotational bands of different isospin may be expected at low excitation energies. We ha…
On the Solution of the Number-Projected Hartree-Fock-Bogoliubov Equations
J. A. Sheikh, E. Lopes, P. Ring
The numerical solution of the recently formulated number-projected Hartree-Fock-Bogoliubov equations is studied in an exactly soluble cranked-deformed shell model Hamiltonian. It i…
Projected shell model study for the yrast-band structure of the proton-rich mass-80 nuclei
R. Palit, J. A. Sheikh, Y. Sun +1
A systematic study of the yrast-band structure for the proton-rich, even-even mass-80 nuclei is carried out using projected shell model approach. We describe the the energy spectra…
Isovector and isoscalar superfluid phases in rotating nuclei
J. A. Sheikh, R. Wyss
The subtle interplay between the two nuclear superfluids, isovector T=1 and isoscalar T=0 phases, are investigated in an exactly soluble model. It is shown that T=1 and T=0 pair-mo…
Moments of inertia for multi-quasiparticle configurations
S. Frauendorf, K. Neergård, J. A. Sheikh +1
Tilted-axis cranking calculations have been performed for multi-quasiparticle states in well deformed A180 nuclei. In the limit of zero pairing, not only are the calculate…
Symmetry Breaking by Proton-Neutron Pairing
S. Frauendorf, J. A. Sheikh
The symmetries of the and pair-fields are different. The consequences for rotational spectra are discussed. For , the concept of spontaneous breaking and subsequen…