Evidence of decrease of potential energy in nonsequential double ionization above threshold for electron impact excitation

28th International Conference on Photonic, Electronic and Atomic Collisions

Chen, Zhangjin^1 ; Lin, C.D.^2

Department of Physics, College of Science, Shantou University, Shantou, Guangdong

515063, China^1

Department of Physics, Kansas State University, Manhattan

KS

66506-2604, United States^2

关键词: Carrier-envelope phase;    Central wavelength;    Correlated electrons;    Electron-impact excitation;    Excitation potentials;    Kinematical analysis;    Nonsequential double ionizations;    Single cycle;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/3/032042/pdf
DOI  :  10.1088/1742-6596/488/3/032042

来源: IOP

【 摘 要 】

We study the CEP (carrier envelope phase) dependent correlated electron momentum distributions for nonsequential double ionization of Ar in near-single-cycle short pulses at the intensity of 3.0 × 1014W/cm2with a central wavelength of 750 nm measured by Bergues et al [Nat. Comm. 3, 813 (2012)]. A kinematical analysis on the constraints for the correlated electron momenta reveals that the excitation potentials of the parent ion Ar+are reduced at the instant of scattering.