Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/8624
Título: | Photon trajectories in incoherent atomic radiation trapping as Levy flights |
Autor(es): | Pereira, Eduardo Jorge Nunes Martinho, José M. G. Santos, Mário N. Berberan |
Palavras-chave: | Levy flights Superdiffusion Radiation trapping Radiation transport Stochastic processes Power law Fractal |
Data: | 17-Set-2004 |
Editora: | American Physical Society |
Revista: | Physical Review Letters |
Citação: | "Physical Review Letters." ISSN 0031-9007. 93:12 (Sept. 2004) 120201. |
Resumo(s): | Photon trajectories in incoherent radiation trapping for Doppler, Lorentz, and Voigt line shapes under complete frequency redistribution are shown to be Levy flights. The jump length (r) distributions display characteristic long tails. For the Lorentz line shape, the asymptotic form is a strict power law r ^ (-3/2), while for Doppler the asymptotic is r ^ -2 (ln r)^ (-1/2). For the Voigt profile, the asymptotic form always has a Lorentz character, but the trajectory is a self-affine fractal with two characteristic Hausdorff scaling exponents. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/8624 |
DOI: | 10.1103/PhysRevLett.93.120201 |
ISSN: | 0031-9007 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - FAMO - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Nunes-Pereira-PRL-93-120201-2004.pdf | 488,64 kB | Adobe PDF | Ver/Abrir |