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An x-ray analysis database of photoionization cross sections including variable ionization
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Cohen, David H. Cassinelli, Joseph P. Wang, Ping MacFarlane, Joseph J. |
| Copyright Year | 1997 |
| Description | Results of research efforts in the following areas are discussed: review of the major theoretical and experimental data of subshell photoionization cross sections and ionization edges of atomic ions to assess the accuracy of the data, and to compile the most reliable of these data in our own database; detailed atomic physics calculations to complement the database for all ions of 17 cosmically abundant elements; reconciling the data from various sources and our own calculations; and fitting cross sections with functional approximations and incorporating these functions into a compact computer code.Also, efforts included adapting an ionization equilibrium code, tabulating results, and incorporating them into the overall program and testing the code (both ionization equilibrium and opacity codes) with existing observational data. The background and scientific applications of this work are discussed. Atomic physics cross section models and calculations are described. Calculation results are compared with available experimental data and other theoretical data. The functional approximations used for fitting cross sections are outlined and applications of the database are discussed. |
| File Size | 757698 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19970018492 |
| Archival Resource Key | ark:/13960/t1kh5hr5w |
| Language | English |
| Publisher Date | 1997-05-12 |
| Access Restriction | Open |
| Subject Keyword | Atomic And Molecular Physics Atomic Physics Tabulation Processes Astrophysics Photoionization Emission Spectra X Ray Spectra Opacity X Ray Analysis Data Reduction Data Bases Ionization Cross Sections Computer Programs Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
