Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006phrvl..96y3201b&link_type=abstract
Physical Review Letters, vol. 96, Issue 25, id. 253201
Astronomy and Astrophysics
Astrophysics
30
Electron-Ion Scattering, Excitation And Ionization, X-Ray Spectra, Atomic Scattering, Cross Sections, And Form Factors, Compton Scattering, X- And Gamma-Ray Telescopes And Instrumentation
Scientific paper
By implementing a large-area, gain-stabilized microcalorimeter array on an electron beam ion trap, the electron-impact excitation cross sections for the dominant x-ray lines in the Fe XVII spectrum have been measured as a function of electron energy establishing a benchmark for atomic calculations. The results show that the calculations consistently predict the cross section of the resonance line to be significantly larger than measured. The lower cross section accounts for several problems found when modeling solar and astrophysical Fe XVII spectra.
Beiersdorfer Peter
Boyce Kevin R.
Brown Gregory V.
Chen Haibin
Gu Min Feng
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