Single-particle widths induced by axially symmetric vibrations in extended fermion matter
We examine the single-particle widths in extended fermion matter originated in the coupling to a harmonic vibration that presents axial symmetry. This is a primary model for the broadening in the nucleon spectrum in an axially symmetric nucleus where a giant collective mode becomes excited. We resor...
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
1986
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
| Sumario: | We examine the single-particle widths in extended fermion matter originated in the coupling to a harmonic vibration that presents axial symmetry. This is a primary model for the broadening in the nucleon spectrum in an axially symmetric nucleus where a giant collective mode becomes excited. We resort to the Quantal Brownian Motion model of the coupled dynamics of collective and intrinsic degrees of freedom in fermion systems and propose a modified kinetic equation for the particle density operator. This equation is solved in the relaxation time approximation from where the single-particle widths are extracted as the collision rates in the fermionic environment. The geometry and dynamics of the collisions are analyzed, as well as the relevance of those sources of energy spread other than the interaction between the particles and the oscillation, such as the temperature and the inelasticity parameter. © 1986. |
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| Bibliografía: | Hernández, Dorso, (1984) Phys. Rev., 100 29, p. 1510 Dorso, Hernández, (1984) Phys. Rev., 100 29, p. 1523 de la Mota, Dorso, Hernández, (1984) Phys. Lett. B, 143, p. 279 Hernández, Dorso, Dissipative dynamics of interacting quantal degrees of freedom in spherical nuclei (1984) Physical Review C, 30, p. 1711 Hernández, On the relaxation of quantal time-dependent harmonic excitations (1985) Physica A: Statistical Mechanics and its Applications, 132 A, p. 28 Hernández, Kievsky, Damping of cylindrical phonons in extense fermion matter (1985) Physical Review A, 32, p. 1810 H.M. Cataldo, E.S. Hernández and C.O. Dorso, Physica A, to be published; Hernández, Solari, (1983) Nucl. Phys. A, 397, p. 115 |
| ISSN: | 03784371 |
| DOI: | 10.1016/0378-4371(86)90009-9 |