Electron Spectroscopy of strontium in the vicinity of four-photon excitation of the 5p2 1S0 state

29th International Conference on Photonic, Electronic, and Atomic Collisions

Dimitriou, A.^1,2 ; Cohen, S.^1

Dept. of Physics, University of Ioannina, Ioannina

GR 45110, Greece^1

Dept. of Physics, University of Crete, Heraklion

GR 71003, Greece^2

关键词: Autoionizing state;    Fluorescence yield;    Four-photon excitation;    Highly-correlated;    Ionization pathways;    Multiphoton ionization;    Photoelectron energy spectra;    Wavelength ranges;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/9/092049/pdf
DOI  :  10.1088/1742-6596/635/9/092049

来源: IOP

【 摘 要 】

We present experimental photoelectron energy spectra and angular distributions from multiphoton ionization of Sr by dye laser pulses of ∼ns duration in the wavelength range of 715-737 nm and relatively low intensity (≈4×1011W·cm-2). The selected wavelength range comprises the highly correlated 5p21S0autoionizing state, excited by four photons. Our results reveal the dominant (single and double) ionization pathways that were obscured in earlier experiments, based solely on the recording of ion and ionic-fluorescence yields.