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  Theoretical characterization of the collective resonance states underlying the xenon giant dipole resonance

Chen, Y.-J., Pabst, S., Karamatskou, A., & Santra, R. (2015). Theoretical characterization of the collective resonance states underlying the xenon giant dipole resonance. Physical Review A, 91(3): 032503. doi:10.1103/PhysRevA.91.032503.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-57F7-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-57F8-3
Genre: Journal Article

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PhysRevA.91.032503.pdf (Publisher version), 574KB
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PhysRevA.91.032503.pdf
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2015
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http://arxiv.org/abs/1502.06462 (Preprint)
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http://dx.doi.org/10.1103/PhysRevA.91.032503 (Publisher version)
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 Creators:
Chen, Yi-Jen1, 2, 3, Author              
Pabst, Stefan2, Author
Karamatskou, Antonia2, 3, Author
Santra, Robin2, 3, Author
Affiliations:
1International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266714              
2Center for Free-Electron Laser Science, DESY, Notkestraße 85, 22607 Hamburg, Germany, ou_persistent22              
3Department of Physics, University of Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany, ou_persistent22              

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Free keywords: PACS numbers: 31.15.ag, 32.80.Aa, 31.15.vj, 32.80.Fb
 Abstract: We present a detailed theoretical characterization of the two fundamental collective resonances underlying the xenon giant dipole resonance (GDR). This is achieved consistently by two complementary methods implemented within the framework of the configuration-interaction singles (CIS) theory. The first method accesses the resonance states by diagonalizing the many-electron Hamiltonian using the smooth exterior complex scaling technique. The second method involves a different application of the Gabor analysis to wave-packet dynamics. We identify one resonance at an excitation energy of 74 eV with a lifetime of 27 as and the second at 107 eV with a lifetime of 11 as. Our work provides a deeper understanding of the nature of the resonances associated with the GDR: a group of close-lying intrachannel resonances splits into two far-separated resonances through interchannel couplings involving the 4d electrons. The CIS approach allows a transparent interpretation of the two resonances as new collective modes. Due to the strong entanglement between the excited electron and the ionic core, the resonance wave functions are not dominated by any single particle-hole state. This gives rise to plasma-like collective oscillations of the 4d shell as a whole.

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Language(s): eng - English
 Dates: 2014-11-212015-03-042015-03
 Publication Status: Published in print
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevA.91.032503
arXiv: 1502.06462
 Degree: -

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Title: Physical Review A
  Other : Phys. Rev. A
  Other : Physical Review A: Atomic, Molecular, and Optical Physics
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 91 (3) Sequence Number: 032503 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: /journals/resource/954925225012_2