3 resultados para LEVRERO, MARIO, 1940-2004
em Diposit Digital de la UB - Universidade de Barcelona
Resumo:
Memòria que recull les activitats realitzades al Centre de Recursos per a l'Aprenentatge i la Investigació de la UB (CRAI-UB) durant el curs acadèmic 2004-2005
Resumo:
Memòria que recull les activitats realitzades al Centre de Recursos per a l'Aprenentatge i la Investigació de la UB durant el curs acadèmic 2003-2004
Resumo:
Isotopic and isotonic chains of superheavy nuclei are analyzed to search for spherical double shell closures beyond Z=82 and N=126 within the new effective field theory model of Furnstahl, Serot, and Tang for the relativistic nuclear many-body problem. We take into account several indicators to identify the occurrence of possible shell closures, such as two-nucleon separation energies, two-nucleon shell gaps, average pairing gaps, and the shell correction energy. The effective Lagrangian model predicts N=172 and Z=120 and N=258 and Z=120 as spherical doubly magic superheavy nuclei, whereas N=184 and Z=114 show some magic character depending on the parameter set. The magicity of a particular neutron (proton) number in the analyzed mass region is found to depend on the number of protons (neutrons) present in the nucleus.