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Abstract
Oscillator strengths of the 2p5(2P1/2)nd J = 2, 3 autoionizing resonances in neon have been determined using a dc discharge plasma in conjunction with an Nd:YAG pumped dye laser system. The excited states are approached using two-step laser excitation via 2p53p′[1/2]1, 2p53p′[3/2]1 and 2p53p′[3/2]2 intermediate states which are accessed from the 2p53s [1/2]2 metastable state, populated by the discharge in the hollow cathode lamp. The f-values have been determined for the nd′[3/2]2, nd′[5/2]2 and nd′[5/2]3 series following the ΔK = ΔJ = +Δℓ selection rule. Employing the saturation technique the photoionization cross section at the 2p5 2P1/2 ionization threshold is determined as 5.5(6) Mb and consequently the f-values of the nd′ J = 2, 3 autoionizing resonances have been extracted.
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