Lifetimes, Branching Ratios, and Transition Probabilities in Co ii

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Journal Title, Volume, Page: 
Phys. Rev. A 31, 744–749 (1985)
Year of Publication: 
S. Salih
University of Wisconsin, Madison, Wisconsin 53706
Current Affiliation: 
Department of Physics, Faculty of Sciences, An-Najah National University, Palestine
J. E. Lawler
University of Wisconsin, Madison, Wisconsin 53706
W. Whaling
Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125
Preferred Abstract (Original): 

The radiative lifetime of 14 levels in the z5F, z5D, and z5G 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 1550 % 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).