K-shell photoejection cross section for neutral iron

Details K-shell photoejection cross section for neutral iron K-shell photoejection cross section for neutral iron

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...337l..21b&link_type=abstract

Astronomy and Astrophysics, v.337, p.L21-L24 (1998)

Astronomy and Astrophysics

Astrophysics

1

Atomic Data, Atomic Processes

Scientific paper

This Letter presents the first ab initio calculation, using the R-matrix method, of the cross section for photoejection of a K-shell electron from neutral iron. A 9-state target state approximation is employed, and the results are compared with recent theoretical values, namely the Hartree-Dirac-Slater method data of Verner and co-workers (1993, 1995). At the highest photon energy considered (640 Ryd), agreement is excellent. However, with decreasing photon energy the two calculations diverge, and the behaviour of the present cross section near threshold shows a rapid rise from threshold in contrast to earlier work for which the behaviour of the cross section as a function of photon energy is approximately linear.

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