Título:
|
Pairing properties in relativistic mean field models obtained from effective field theory
|
Autor/a:
|
Estal, Manuel del; Centelles Aixalà, Mario; Patra, S. K.; Viñas Gausí, Xavier
|
Otros autores:
|
Universitat de Barcelona |
Abstract:
|
We apply recently developed effective field theory nuclear models in mean field approximation (parameter sets G1 and G2) to describe ground-state properties of nuclei from the valley of $\beta$-stability up to the drip lines. For faster calculations of open-shell nuclei we employ a modified BCS approach which takes into account quasi-bound levels owing to their centrifugal barrier, with a constant pairing strength. We test this simple prescription by comparing with available Hartree-plus-Bogoliubov results. Using the new effective parameter sets we then compute separation energies, density distributions and spin--orbit potentials in isotopic (isotonic) chains of nuclei with magic neutron (proton) numbers. The new forces describe the experimental systematics similarly to conventional non-linear $\sigma-\omega$ relativistic force parameters like NL3. |
Materia(s):
|
-Estructura nuclear -Models nuclears -Relativitat (Física) -Nuclear structure -Nuclear models -Relativity (Physics) |
Derechos:
|
(c) The American Physical Society, 2001
|
Tipo de documento:
|
Artículo Artículo - Versión publicada |
Editor:
|
The American Physical Society
|
Compartir:
|
|