Coincidence measurements following 2p photoionization in Mg

28th International Conference on Photonic, Electronic and Atomic Collisions

Sokell, E.^1 ; Bolognesi, P.^2 ; Safgren, S.^1 ; Avaldi, L.^2

School of Physics, UCD Science Centre, Belfield, Dublin 4, Ireland^1

CNR-Istituto di Metodologie Inorganiche e Dei Plasmi, Area della Ricerca di Roma1, Monterotondo Scalo

00015, Italy^2

关键词: Auger electron;    Coincidence measurement;    Excess energy;    Ionization thresholds;    Photon energy;    Triple differential cross sections;    TWo-step model;    Two-step process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/2/022020/pdf
DOI  :  10.1088/1742-6596/488/2/022020

来源: IOP

【 摘 要 】

Triple Differential Cross-Section (TDCS) measurements have been made to investigate the 2p pho-toionization of Magnesium. In the experiment the photoelectron and the L3-M1M1Auger electron have been detected in coincidence at four distinct photon energies from 7 to 40 eV above the 2p threshold. Auger decay is usually treated as a two-step process, where the intermediate single hole-state makes the link between the pho-toionization and decay processes. These measurements allow the investigation of the process as a function of excess energy, and specifically to test the validity of the two-step model as the ionization threshold is approached.