Electron-electron correlation in two-photon double ionization of He-like ions [Counterintuitive electron correlation in two-photon double ionization of He-like ions]

Hu, S. X.

doi:10.1103/PhysRevA.97.013414

Title: Electron-electron correlation in two-photon double ionization of He-like ions [Counterintuitive electron correlation in two-photon double ionization of He-like ions]

Journal Article · Thu Jan 18 00:00:00 EST 2018 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.97.013414· OSTI ID:1417644

Hu, S. X. ^[1]

Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics

Electron correlation plays a crucial role in quantum many-body physics ranging from molecular bonding, strong-field–induced multi-electron ionization, to superconducting in materials. Understanding the dynamic electron correlation in the photoionization of relatively simple quantum three-body systems, such as He and He-like ions, is an important step toward manipulating complex systems through photo-induced processes. Here we have performed ab initio investigations of two-photon double ionization (TPDI) of He and He-like ions [Li⁺, Be²⁺, and C⁴⁺] exposed to intense attosecond x-ray pulses. Results from such fully correlated quantum calculations show weaker and weaker electron correlation effects in TPDI spectra as the ionic charge increases, which is counterintuitive to the belief that the strongly correlated ground state and the strong Coulomb field of He-like ions should lead to more equal-energy sharing in photoionization. Lastly, these findings indicate that the final-state electron–electron correlation ultimately determines their energy sharing in TPDI.

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Research Organization:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0001944

OSTI ID:: 1417644

Alternate ID(s):: OSTI ID: 1417407

Report Number(s):: 2017-194, 1369; PLRAAN; 2017-194, 2325, 1369; TRN: US1801093

Journal Information:: Physical Review A, Vol. 97, Issue 1; ISSN 2469-9926

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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Understanding two-photon double ionization of helium from the perspective of the characteristic time of dynamic transitions Li, Fei; Jin, Facheng; Yang, Yujun Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 52, Issue 19 https://doi.org/10.1088/1361-6455/ab390a	journal	September 2019
Two-Electron Interference in Strong-Field Ionization of He by a Short Intense Extreme Ultraviolet Laser Pulse Jiang, Wei-Chao; Chen, Si-Ge; Peng, Liang-You Physical Review Letters, Vol. 124, Issue 4 https://doi.org/10.1103/physrevlett.124.043203	journal	January 2020

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