Radiative Lifetimes in W I Using a Novel Atomic-Beam Source

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Journal Title, Volume, Page: 
PHYSICAL REVIEW A,VOLUME 24, NUMBER 5,NOVEMBER 1981
Year of Publication: 
1981
Authors: 
D. W. Duquette
Department of Physics, University of Wisconsin, Madison, Wisconsin 53706
S. Salih
Department of Physics, University of Wisconsin, Madison, Wisconsin 53706
Current Affiliation: 
Department of Physics, Faculty of Sciences, An-Najah National University, Palestine
J. E. Lawler
Department of Physics, University of Wisconsin, Madison, Wisconsin 53706
Preferred Abstract (Original): 
The first direct radiative lifetime measurements in W I are described. Radiative lifetimes of 15 levels from the 5d46s(a6D)6p(z7D0), 5d46s(a6D)6p(z5F0), 5d5(a6S)6p(z7P0),, and 5d46s(a6D)6p(z5P0) terms are reported with an accuracy of ±5%. The lifetimes are measured using time-resolved laser-induced fluorescence and a novel atomic-beam source. This novel hollow cathode effusive beam source produces an intense beam of ground-state W atoms and metastable W atoms.