Measurements of oscillator strengths of the 2p5(2P1/2)nd J=2, 3 autoionizing resonances in neon

Oscillator strengths of the 2p(5)(P-2(1/2))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 2p(5)3p'[1/2](1), 2p(5)3p'[3/2](1) and 2p(5)3p'[3/2](2) intermediate states which are accessed from the 2p(5)3s [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 Delta K = Delta J = + Delta l selection rule. Employing the saturation technique the photoionization cross section at the 2p(5) P-2(1/2) 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.