Abstract
The ionization spectrum of strontium atoms in an air/acetylene flame under pulsed laser excitation has been recently reported. Single-step as well as two-step excitation was provided by an excimer-pumped dye laser tuned in the blue region of the spectrum. The collisionally assisted ionization in the flame was measured with a water-cooled electrode immersed in the flame and negatively biased (–1300 V), while the charges produced were collected at the burner, converted into a voltage signal, and processed by a boxcar integrator.
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