Accurate oscillator strengths for interstellar ultraviolet lines of CL I

Abstract

view Abstract Citations (30) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Accurate Oscillator Strengths for Interstellar Ultraviolet Lines of CL i Schectman, R. M. ; Federman, S. R. ; Beideck, D. J. ; Ellis, D. J. Abstract Analyses on the abundance of interstellar chlorine rely on accurate oscillator strengths for ultraviolet transitions. Beam-foil spectroscopy was used to obtain f-values for the astrophysically important lines of Cl I at 1088, 1097, and 1347 A. In addition, the line at 1363 A was studied. Our f-values for 1088, 1097 A represent the first laboratory measurements for these lines; the values are f(1088)=0.081 +/- 0.007 (1 sigma) and f(1097) = 0.0088 +/- 0.0013 (1 sigma). These results resolve the issue regarding the relative strengths for 1088, 1097 A in favor of those suggested by astronomical measurements. For the other lines, our results of f(1347) = 0.153 +/- 0.011 (1 sigma) and f(1363) = 0.055 +/- 0.004 (1 sigma) are the most precisely measured values available. The f-values are somewhat greater than previous experimental and theoretical determinations. Publication: The Astrophysical Journal Pub Date: April 1993 DOI: 10.1086/172484 Bibcode: 1993ApJ...406..735S Keywords: Atomic Spectra; Chlorine; Interstellar Matter; Interstellar Radiation; Molecular Clouds; Oscillator Strengths; Ultraviolet Spectra; Optical Transition; Stellar Oscillations; Ultraviolet Spectroscopy; Astrophysics; ATOMIC DATA; ISM: ATOMS; ULTRAVIOLET: INTERSTELLAR full text sources ADS |