13 documents found, page 1 of 2
Tensor coupling and pseudospin symmetry in nuclei
Alberto, P.; Lisboa, R.; Malheiro, M.; De Castro, A. S. [UNESP]Made available in DSpace on 2022-04-28T19:59:53Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-01-01; In this work we study the contribution of the isoscalar tensor coupling to the realization of pseudospin symmetry in nuclei. Using realistic values for the tensor coupling strength, we show that this coupling reduces noticeably the pseudospin splittings, especially for single-particle levels near the Fe...
Relating pseudospin and spin symmetries through charge conjugation and chiral t...
Castro, A. S. De [UNESP]; Alberto, P.; Lisboa, R.; Malheiro, M.Made available in DSpace on 2022-04-28T20:07:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-01-01; We solve the generalized relativistic harmonic oscillator in 1+1 dimensions, i.e., including a linear pseudoscalar potential and quadratic scalar and vector potentials which have equal or opposite signs. We consider positive and negative quadratic potentials and discuss in detail their bound-state solut...
Spin and pseudospin symmetries in the antinucleon spectrum of nuclei
Lisboa, R.; Malheiro, M.; Alberto, P.; Fiolhais, M.; De Castro, A. S. [UNESP]Made available in DSpace on 2022-04-28T21:02:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-06-28; Spin and pseudospin symmetries in the spectra of nucleons and antinucleons are studied in a relativistic mean-field theory with scalar and vector Woods-Saxon potentials, in which the strength of the latter is allowed to change. We observe that, for nucleons and antinucleons, the spin symmetry is of pert...
Pseudospin symmetry and the relativistic harmonic oscillator
Lisboa, R.; Malheiro, M.; de Castro, A. S. [UNESP]; Alberto, P.; Fiolhais, M.Made available in DSpace on 2022-04-29T08:14:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-01-01; A generalized relativistic harmonic oscillator for spin 1/2 particles is studied. The Dirac Hamiltonian contains a scalar [Formula Presented] and a vector [Formula Presented] quadratic potentials in the radial coordinate, as well as a tensor potential [Formula Presented] linear in [Formula Presented]. S...
Antinucleon spectra in the Dirac equation with scalar and vector Wood-Saxon pot...
Lisboa, R.; Malheiro, M.; Alberto, P.; Castro, A. S. de [UNESP]; Guimaraes, V; BrandaoDeOliveira, JR; Macario, KCD; Genezini, F. A.Made available in DSpace on 2020-12-10T16:35:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-01-01; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); We analyze here the spin and pseudospin symmetry for the antinucleon spectra solving the Dirac equation with scalar and vector Wood-Saxon potentials. In relativistic nucle...
Relativistic pseudospin and spin symmetries in physical systems - recent results
Alberto, P.; Castro, A. [UNESP]; Fiolhais, M.; Lisboa, R.; Malheiro, M.; Vagenas, E. C.; Vlachos, D. S.Made available in DSpace on 2019-10-04T12:29:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-01; In this paper we revise the main features of pseudospin and spin symmetries of the Dirac equation with scalar and vector potentials and mention several of its applications to physical systems. These symmetries have been extensively researched in the last 15 years, especially pseudospin symmetry, mainly ...
Temperature effects on nuclear pseudospin symmetry in the Dirac-Hartree-Bogoliu...
Lisboa, R.; Alberto, P.; Carlson, B. V.; Malheiro, M.We present finite temperature Dirac-Hartree-Bogoliubov (FTDHB) calculations for the tin isotope chain to study the dependence of pseudospin on the nuclear temperature. In the FTDHB calculation, the density dependence of the self-consistent relativistic mean fields, the pairing, and the vapor phase that takes into account the unbound nucleon states are considered self-consistently. The mean field potentials obta...
Antinucleon spectra in the Dirac equation with scalar and vector Wood-Saxon pot...
Lisboa, R.; Malheiro, M.; Alberto, P.; De Castro, A. S. [UNESP]Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:24:02Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:41:08Z : No. of bitstreams: 1 2-s2.0-70450218929.pdf: 148012 bytes, checksum: a92a30b046d04bf2a4f7a75275034cb7 (MD5); Made available in DSpace on 2014-05-27T11:24:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-11-27; We analyze here the spin and pseudo...
Pseudospin and spin symmetries in the relativistic harmonic oscillator
Albertoa, P.; Castro, A. [UNESP]; Malheiro, M.; Lisboa, R.Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:22:05Z No. of bitstreams: 0; Made available in DSpace on 2014-05-27T11:22:05Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-12-01; We compute the analytical solutions of the generalized relativistic harmonic oscillator in 1+1 dimensions, including a linear pseudoscalar potential and quadratic scalar and vector pot...
Bounded solutions for nonconserving-parity pseudoscalar potentials
de Castro, A. S.; Malheiro, M.; Lisboa, R.Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2014-02-26T17:21:01Z No. of bitstreams: 0; Made available in DSpace on 2014-02-26T17:21:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-01-01; Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:27:34Z No. of bitstreams: 0; Made available in DSpace on 2014-05-20T13:27:34Z (GMT). No. of bitstreams: 0 ...