Absolute high-resolution Se+ photoionization cross-section measurementswith Rydberg-series analysis
نویسندگان
چکیده
Absolute high-resolution Se+ photoionization cross-section measurements with Rydberg-series analysis" (2011). Absolute single photoionization cross-section measurements for Se + ions were performed at the Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory using the photo-ion merged-beams technique. Measurements were made at a photon energy resolution of 5.5 meV from 17.75 to 21.85 eV spanning the 4s 2 4p 3 4 S o 3/2 ground-state ionization threshold and the 2 P o 3/2 metastable state thresholds. Extensive analysis of the complex resonant structure in this region identified numerous Rydberg series of resonances and obtained the Se 2+ 4s 2 4p 2 3 P 2 and 4s 2 4p 2 1 S 0 state energies. In addition, particular attention was given to removing significant effects in the measurements due to a small percentage of higher-order undulator radiation.
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