COLLISION BASED SPECTROSCOPY OF NA-LIKE AND MG-LIKE ARGON

In this work, Ne-like Ar8+ ions in metastable 2p(5)3s P-3(0,2) levels from an ECR source were passed through a He gas target to populate cor e excited levels of Na-like Ar7+. The resulting spectra were measured and compared with those from Ar9+ passing the Same He target The popul ation mechanism for core excited 2p(5)3p(2) based on one electron capt ure by the metastable Ar8+ levels is discussed. Our results indicate t hat the two electron-one photon transitions from 2p(5)3s4p is the main populating process. Also, by increasing the length of the gas target, enhancement of the intensity ratio between lines from long lived and short lived levels was observed.