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Depolarization effects in pulsed photoionization of state-selected lithium atoms have been observed. Experimental evidence and theoretical analysis demonstrate that these effects are produced by resonant excitation of the 2²P state. Based upon the analysis, it is argued that resonant excitation of the 2²P state with circularly polarized cw laser light followed by broad-band pulsed ionizing radiation can be used to produce an intense highly polarized electron beam with longitudinal polarization.
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Alguard et al. (1977) studied this question.
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