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Lifetimes, branching ratios, and transition probabilities in Co ii

Salih, S. and Lawler, J. E. and Whaling, W. (1985) Lifetimes, branching ratios, and transition probabilities in Co ii. Physical Review A, 31 (2). pp. 744-749. ISSN 0556-2791. doi:10.1103/PhysRevA.31.744.

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The radiative lifetime of 14 levels in the z^5F, z^5D, and z^5G terms of Co ii have been measured with use of time-resolved laser fluorescence spectroscopy with a Co+-ion beam. Our lifetime values are shorter by 15–50 % than earlier results from beam-foil time-of-flight measurements. The lifetimes were converted to 41 individual transition probabilities with use of branching ratios measured on spectra recorded with the 1-m Fourier-transform spectrometer at the Kitt Peak National Observatory. On average our transition probabilities agree with those of Kurucz and Peytremann; for ΔS=1 transitions their calculated values are lower than our experimental results by a factor of ∼(1/4).

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Additional Information:©1985 The American Physical Society Received 24 August 1984 This research was supported in part by National Science Foundation Grants Nos. AST-83-00948 and AST-83-17713. We are indebted to J. W. Brault and the National Solar Observatory-National Optical Astronomical Observatory (NSO-NOAO) staff for assistance with the KPFTS spectra. The National Solar Observatory is operated by Association of Universities for Research in Astronomy (AURA), Inc., under contract with the National Science Foundation.
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Deposited On:21 Dec 2006
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