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https://dspace.uzhnu.edu.ua/jspui/handle/lib/31100
Title: | Excitation-autoionization contribution to single ionization of Sr by electron impact |
Authors: | Borovik, V Shafranyosh, I Borovik, O |
Keywords: | atom, autoionization, cross-section, single ionization |
Issue Date: | 2020 |
Publisher: | Physica Scripta |
Series/Report no.: | ;95 |
Abstract: | The 4p6 excitation-autoionization (EA) cross-section of Sr atoms has been measured at electron-impact energies from the threshold to 600eV. The cross-section has a pronounced resonance character in the near-threshold region, reaching its maximum value of (2.5±0.8)×10−16 cm2 at 24.5eV. The shape and absolute value of the cross-section are determined by the excitation dynamics and the decay mode of autoionizing states from 4p54d5s2, 4p54d2nl and 4p54d5snl configurations. A comparative analysis of the measured EA cross-section, the calculated 5s2 ionization cross-section and the available ionization data showed that (i) direct ionization of the 5s2 shell and EA of the 4p6 shell adequately describe the single ionization of Sr atoms; (ii) 4p6 EA contribution reaches 25% of the total single ionization cross-section of Sr atoms. |
Type: | Text |
Publication type: | Стаття |
URI: | https://dspace.uzhnu.edu.ua/jspui/handle/lib/31100 |
Appears in Collections: | Наукові публікації кафедри квантової електроніки |
Files in This Item:
File | Description | Size | Format | |
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sr-psr-total (1).pdf | 566.34 kB | Adobe PDF | View/Open |
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