Quasiparticle continuum and resonances in the Hartree-Fock-Bogoliubov theory

Pei, Junchen; Kruppa, A T; Nazarewicz, W

doi:10.1103/PhysRevC.84.024311

Title: Quasiparticle continuum and resonances in the Hartree-Fock-Bogoliubov theory

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physical Review, C (Nuclear Physics)

DOI:https://doi.org/10.1103/PhysRevC.84.024311· OSTI ID:1037051

Pei, Junchen ^[1]; Kruppa, A T ^[2]; Nazarewicz, W ^[3]

ORNL
Joint Institute for Heavy Ion Research, Oak Ridge
University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)

The quasi-particle energy spectrum of the Hartree-Fock-Bogoliubov (HFB) equations contains discrete bound states, resonances, and non-resonant continuum states. We study the structure of the unbound quasi-particle spectrum of weakly bound nuclei within several methods that do not rely on imposing scattering or outgoing boundary conditions. Various approximations are examined to estimate resonance widths. It is shown that the stabilization method works well for all HFB resonances except for very narrow ones. The Thomas-Fermi approximation to the non-resonant continuum has been shown to be very effective, especially for coordinate-space HFB calculations in large boxes that involve huge amounts of discretized quasi-particle continuum states.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: DE-AC05-00OR22725

OSTI ID:: 1037051

Journal Information:: Physical Review, C (Nuclear Physics), Vol. 84, Issue 2

Country of Publication:: United States

Language:: English

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