| Texto completo | |
| Autor(es): |
Mangiarotti, A.
;
Martins, M. N.
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW A; v. 94, n. 2, p. 12-pg., 2016-08-15. |
| Resumo | |
Despite the fact that the first calculations of nuclear bremsstrahlung cross sections were performed for relativistic electrons more than 80 years ago by Sauter, Bethe and Heitler, and Racah, a fully satisfactory solution to this problem is still missing up to the present day. Numerical approaches are impractical for electrons with energies above a few MeV because they require a prohibitively large number of partial waves. Analytic formulae need to describe simultaneously and accurately the interaction with the Coulomb field of the nucleus and the screening effect of the atomic electrons. In the present paper, a state-of-the-art analytic calculation will be discussed. In particular, higher-order corrections to the interaction with the Coulomb field of the nucleus, a subject seldom tackled in the past, are included and compared extensively with published data. The emerged difficulties will be highlighted, but unfortunately they can be overcome only with future large coordinated theoretical and experimental efforts. (AU) | |
| Processo FAPESP: | 13/15634-5 - Estudo das propriedades do bremsstrahlung na faixa de energia de alguns MeV |
| Beneficiário: | Marcos Nogueira Martins |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisador Visitante - Internacional |