Absolute Photoionization Cross Section Measurements of O II Ions from 29.7 to 46.2 eV

Details Absolute Photoionization Cross Section Measurements of O II Ions from 29.7 to 46.2 eV Absolute Photoionization Cross Section Measurements of O II Ions from 29.7 to 46.2 eV

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apjs..146..467a&link_type=abstract

The Astrophysical Journal Supplement Series, Volume 146, Issue 2, pp. 467-477.

Astronomy and Astrophysics

Astronomy

21

Atomic Data, Atomic Processes, Methods: Laboratory

Scientific paper

Absolute photoionization cross sections have been measured for a mixture of ground-state and metastable O II (O+) ions at photon energies ranging from 29.9 to 46.0 eV (414.7 to 269.5 Å). All measurements were performed by merging an O+ beam with synchrotron radiation from an undulator beam line at the Advanced Light Source (ALS). At a resolution of 17 meV, more than 70 spectral features have been resolved, most of them identified and characterized. These measurements are compared with two independent R-matrix calculations and the data in TOPbase. All three calculations agree within 25% on the direct photoionization cross section, and with the absolute measurements within 40%. Some differences are noted in the predicted resonance positions among the three close-coupling R-matrix calculations, the TOPbase data being the least accurate. The estimated total experimental uncertainty varies from 15% to 20%. Such measurements benchmark theoretical photoionization cross section calculations performed within the framework of the Opacity Project and the Iron Project.

Affiliated with

Also associated with

No associations

Rating

Absolute Photoionization Cross Section Measurements of O II Ions from 29.7 to 46.2 eV does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Absolute Photoionization Cross Section Measurements of O II Ions from 29.7 to 46.2 eV, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute Photoionization Cross Section Measurements of O II Ions from 29.7 to 46.2 eV will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1820710