In this paper, some achievements of an equations-of-motion approach to nuclear structure theory are discussed. As an introduction to the main subject, a brief survey of some early work is given. We then describe a formalism for treating the pairing-force problem and show, by numerical applications, that at the lowest order of approximation it provides an advantageous alternative to the BCS method. Finally, we discuss how to treat a general shell-model Hamiltonian within the framework of the seniority scheme. This makes it possible to further reduce seniority-truncated shell-model spaces, as is illustrated by examples.
Pairing and seniority in an equations-of-motion approach to nuclear structure theory / A., Covello; Andreozzi, Francesco; A., Gargano; Porrino, Antonio. - In: PHYSICA SCRIPTA. - ISSN 0031-8949. - STAMPA. - T32:(1990), pp. 7-13. [10.1088/0031-8949/1990/T32/001]
Pairing and seniority in an equations-of-motion approach to nuclear structure theory
ANDREOZZI, FRANCESCO;PORRINO, ANTONIO
1990
Abstract
In this paper, some achievements of an equations-of-motion approach to nuclear structure theory are discussed. As an introduction to the main subject, a brief survey of some early work is given. We then describe a formalism for treating the pairing-force problem and show, by numerical applications, that at the lowest order of approximation it provides an advantageous alternative to the BCS method. Finally, we discuss how to treat a general shell-model Hamiltonian within the framework of the seniority scheme. This makes it possible to further reduce seniority-truncated shell-model spaces, as is illustrated by examples.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.