Five-photon sequential double ionization of He in intense extreme-ultraviolet free-electron laser fields

Y. Hikosaka; M. Fushitani; A. Matsuda; T. Endo; Y. Toida; E. Shigemasa; M. Nagasono; K. Tono; T. Togashi; M. Yabashi; T. Ishikawa; A. Hishikawa

doi:10.1103/PhysRevA.90.053403

Five-photon sequential double ionization of He in intense extreme-ultraviolet free-electron laser fields

Y. Hikosaka^*, M. Fushitani, A. Matsuda, T. Endo, Y. Toida, E. Shigemasa, M. Nagasono, K. Tono, T. Togashi, M. Yabashi, T. Ishikawa, A. Hishikawa

^*Corresponding author for this work

Faculty of Liberal Arts and Sciences

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

A multiphoton ionization process of He in intense extreme ultraviolet free-electron laser fields is investigated in a photon energy range of hv=20.1-20.8eV using shot-by-shot photoelectron spectroscopy. A photoelectron peak resulting from sequential double ionization of He due to five-photon absorption is observed around hv=20.4. Shot-by-shot analysis of photoelectron spectra shows that two-photon resonance to the He+(2s2S) state from the He+ ground state is responsible for the substantial enhancement of five-photon double ionization. Effective cross sections for two-photon absorption between the 1s and 2s states of He+ and for one-photon absorption from the He+ 2s state are obtained.

Original language	English
Article number	053403
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	90
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevA.90.053403
State	Published - 2014/11/03

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.90.053403

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Hikosaka, Y., Fushitani, M., Matsuda, A., Endo, T., Toida, Y., Shigemasa, E., Nagasono, M., Tono, K., Togashi, T., Yabashi, M., Ishikawa, T., & Hishikawa, A. (2014). Five-photon sequential double ionization of He in intense extreme-ultraviolet free-electron laser fields. Physical Review A - Atomic, Molecular, and Optical Physics, 90(5), Article 053403. https://doi.org/10.1103/PhysRevA.90.053403

@article{773ca09f5f8e46c185717102da98cffd,

title = "Five-photon sequential double ionization of He in intense extreme-ultraviolet free-electron laser fields",

abstract = "A multiphoton ionization process of He in intense extreme ultraviolet free-electron laser fields is investigated in a photon energy range of hv=20.1-20.8eV using shot-by-shot photoelectron spectroscopy. A photoelectron peak resulting from sequential double ionization of He due to five-photon absorption is observed around hv=20.4. Shot-by-shot analysis of photoelectron spectra shows that two-photon resonance to the He+(2s2S) state from the He+ ground state is responsible for the substantial enhancement of five-photon double ionization. Effective cross sections for two-photon absorption between the 1s and 2s states of He+ and for one-photon absorption from the He+ 2s state are obtained.",

author = "Y. Hikosaka and M. Fushitani and A. Matsuda and T. Endo and Y. Toida and E. Shigemasa and M. Nagasono and K. Tono and T. Togashi and M. Yabashi and T. Ishikawa and A. Hishikawa",

note = "Publisher Copyright: {\textcopyright} 2014 American Physical Society.",

year = "2014",

month = nov,

day = "3",

doi = "10.1103/PhysRevA.90.053403",

language = "英語",

volume = "90",

journal = "Physical Review A - Atomic, Molecular, and Optical Physics",

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Hikosaka, Y, Fushitani, M, Matsuda, A, Endo, T, Toida, Y, Shigemasa, E, Nagasono, M, Tono, K, Togashi, T, Yabashi, M, Ishikawa, T & Hishikawa, A 2014, 'Five-photon sequential double ionization of He in intense extreme-ultraviolet free-electron laser fields', Physical Review A - Atomic, Molecular, and Optical Physics, vol. 90, no. 5, 053403. https://doi.org/10.1103/PhysRevA.90.053403

TY - JOUR

T1 - Five-photon sequential double ionization of He in intense extreme-ultraviolet free-electron laser fields

AU - Hikosaka, Y.

AU - Fushitani, M.

AU - Matsuda, A.

AU - Endo, T.

AU - Toida, Y.

AU - Shigemasa, E.

AU - Nagasono, M.

AU - Tono, K.

AU - Togashi, T.

AU - Yabashi, M.

AU - Ishikawa, T.

AU - Hishikawa, A.

PY - 2014/11/3

Y1 - 2014/11/3

N2 - A multiphoton ionization process of He in intense extreme ultraviolet free-electron laser fields is investigated in a photon energy range of hv=20.1-20.8eV using shot-by-shot photoelectron spectroscopy. A photoelectron peak resulting from sequential double ionization of He due to five-photon absorption is observed around hv=20.4. Shot-by-shot analysis of photoelectron spectra shows that two-photon resonance to the He+(2s2S) state from the He+ ground state is responsible for the substantial enhancement of five-photon double ionization. Effective cross sections for two-photon absorption between the 1s and 2s states of He+ and for one-photon absorption from the He+ 2s state are obtained.

AB - A multiphoton ionization process of He in intense extreme ultraviolet free-electron laser fields is investigated in a photon energy range of hv=20.1-20.8eV using shot-by-shot photoelectron spectroscopy. A photoelectron peak resulting from sequential double ionization of He due to five-photon absorption is observed around hv=20.4. Shot-by-shot analysis of photoelectron spectra shows that two-photon resonance to the He+(2s2S) state from the He+ ground state is responsible for the substantial enhancement of five-photon double ionization. Effective cross sections for two-photon absorption between the 1s and 2s states of He+ and for one-photon absorption from the He+ 2s state are obtained.

UR - http://www.scopus.com/inward/record.url?scp=84909951624&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.90.053403

DO - 10.1103/PhysRevA.90.053403

M3 - 学術論文

AN - SCOPUS:84909951624

SN - 1050-2947

VL - 90

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

IS - 5

M1 - 053403

ER -

Five-photon sequential double ionization of He in intense extreme-ultraviolet free-electron laser fields

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