Naslov
Double and single ionization of He -like atoms by absorption of a photon at intermediate energies: Generalized AFT approach

Autori
Surić, T. ; Pratt, R.H.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Bulletin of the American Physical Society / - , 2000

Skup
2002 Division of Atomic, Molecular and Optical Physics Annual Meeting (DAMOP02)

Mjesto i datum
Williamsburg (VA), Sjedinjene Američke Države, 29.05.2002. - 01.06.2002

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
photon; high energy

Sažetak
We study single and double ionization of He--like atoms from the ground state by absorption of a single photon at intermediate (around 1 keV and above for He) incident photon energies. Using our generalized AFT approach we are able to identify the dominant correlation effects which determine the total cross sections and the (shake--off) ratio of double to single ionization in this energy range, not just for the asymptotic high energy limit obtained previously. We obtain analytical expressions for the cross sections and double to single ratio valid within a few percent in keV region for He. Our analysis shows that the relatively slow convergence of the double to single shake--off ratio (despite the cancelation of the Stobbe factor) to the shake--off limit is due to the large contribution of final state correlation involving angular momentum transfer between the fast and slow electron.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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