A Compilation of Energy Levels and Wavelengths for the Spectrum of Neutral Beryllium (Be I)
- Institute for Spectroscopy, Russian Academy of Sciences, 142092 Troitsk, Moscow Region (Russia)
- Physics Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-0001 (United States)
In this compilation we have used data from some 20 references, only two of which were available to C. E. Moore for her 1949 {ital Atomic Energy Levels} tables. The new compilation thus includes significant revisions, extensions, and improvements of the earlier data for configurations of the types 1s{sup 2}2snl and 1s{sup 2}2pnl and also extends the energy range to higher configurations, including those involving 1s electron excitation. The observed wavelengths for some 200 lines are given with their energy-level classifications. The wavelength measurements, which extend from 89 to 31780 {Angstrom}, were obtained from emission spectra of hollow-cathode and arc discharges, beam-foil spectra, and far-ultraviolet photoabsorption spectra. In addition to the energy levels derived from these spectra, we include levels obtained from multiphoton resonance-ionization mass spectrometry and projectile-Auger spectroscopy. We have evaluated a number of levels by using series formulas and/or theoretical results; these levels are more accurate than values derived from available wavelength measurements. Wavelengths calculated from energy-level differences are given for all lines; these {open_quotes}Ritz{close_quotes} wavelengths are more accurate than the observed values wherever the differences are significant. {copyright} {ital 1997 American Institute of Physics and American Chemical Society.}
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 542581
- Journal Information:
- Journal of Physical and Chemical Reference Data, Vol. 26, Issue 5; Other Information: PBD: Sep 1997
- Country of Publication:
- United States
- Language:
- English
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