Abstract
An accelerated beam of Cl− ions is photodetached by a single-mode Nd:YAG laser, and the resulting neutrals are detected. By measuring the saturation intensity of this process, one derives the cross section for four-photon detachment. This cross section is smaller by a factor of 6 than a recently calculated value. Comparison of the photodetachment saturation intensity of Cl− with those of other halogen negative ions shows that this corresponds to regular behavior among the halogen elements, suggesting limitations in the theoretical models.
© 1989 Optical Society of America
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