CALCULATION OF GIANT RESONANCE WIDTHS FROM DAMPED SINGLE PARTICLE MOTION

Autor:	E. J. Moniz, F. E. Serr, Ying-Cai Wang, N. Teruya, Mahir S. Hussein, Hélio Dias
Rok vydání:	1992
Předmět:	Physics Nuclear and High Energy Physics Scattering Giant resonance Isoscalar Nuclear Theory Quadrupole General Physics and Astronomy Resonance Atomic physics Nucleon Magnetosphere particle motion Vertex (geometry)
Zdroj:	International Journal of Modern Physics E. :833-844
ISSN:	1793-6608 0218-3013
Popis:	The spreading and escape widths of giant resonances are evaluated by considering damped particle and hole propagation in the nucleus. The magnitude and averaged A-dependence of the isoscalar quadrupole resonance widths are reproduced qualitatively when the nucleon optical potential, fit globally to low-energy scattering, is used to damp nucleon motion. Contributions from hole state widths and from vertex corrections increase and decrease the giant resonance widths, respectively. Qualitative agreement with experimental widths is shown for 16 O , 40 Ca and 208 Pb . Comparison with recent calculations within continuum RPA is made.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d26082b30d1ce7b5b664de358ed3e35e https://doi.org/10.1142/s0218301392000369 Zobrazit plný text záznamu