Photoionization and subsequent Auger decay of a K 2s vacancy
Soronen, J.; Aho, S. M.; Jänkälä, K.; Huttula, M.; Bizau, J. M.; Cubaynes, D.; Andric, L.; Feng, J.; Ismail, J.; Lablanquie, P.; Penent, F.; Palaudoux, J. (2024-01-22)
American physical society
22.01.2024
Soronen, J., Aho, S.-M., Jänkälä, K., Huttula, M., Bizau, J.-M., Cubaynes, D., Andric, L., Feng, J., Ismail, I., Lablanquie, P., Penent, F., & Palaudoux, J. (2024). Photoionization and subsequent Auger decay of a K 2 s vacancy. Physical Review A, 109(1), 013108. https://doi.org/10.1103/PhysRevA.109.013108
https://rightsstatements.org/vocab/InC/1.0/
© 2024 American Physical Society
https://rightsstatements.org/vocab/InC/1.0/
© 2024 American Physical Society
https://rightsstatements.org/vocab/InC/1.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202404232898
https://urn.fi/URN:NBN:fi:oulu-202404232898
Tiivistelmä
Abstract
The photoionization and subsequent Auger decay of the 2s subshell in vapor phase potassium are investigated using multielectron coincidence spectroscopy with synchrotron radiation. This method, capable of detecting multiple particles simultaneously, enables a comprehensive description of all cascade decay paths of the K 2s vacancy. It establishes, at each step of the 2s cascade decay, whether the outer 4s electron is a spectator or participates in the decay. The study determines the populations of the cascade final state and the different ionization rates. Experimental findings are compared with theoretical predictions derived from the multiconfiguration Dirac-Fock approach and previous observations of cascade processes in argon, emphasizing differences attributed to the presence of an additional 4s electron. The research contributes to our understanding of the electronic structure of potassium and quantum mechanical transition processes.
The photoionization and subsequent Auger decay of the 2s subshell in vapor phase potassium are investigated using multielectron coincidence spectroscopy with synchrotron radiation. This method, capable of detecting multiple particles simultaneously, enables a comprehensive description of all cascade decay paths of the K 2s vacancy. It establishes, at each step of the 2s cascade decay, whether the outer 4s electron is a spectator or participates in the decay. The study determines the populations of the cascade final state and the different ionization rates. Experimental findings are compared with theoretical predictions derived from the multiconfiguration Dirac-Fock approach and previous observations of cascade processes in argon, emphasizing differences attributed to the presence of an additional 4s electron. The research contributes to our understanding of the electronic structure of potassium and quantum mechanical transition processes.
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