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Title: Laser control over the ultrafast Coulomb explosion of N 2 2 + after Auger decay: A quantum-dynamics investigation

Abstract

By theoretical calculation, we show the possibility to control and partially suppress the Coulomb explosion of N 2 molecules after core-level photoionization by an x-ray laser and subsequent Auger decay. This is achieved by means of a femtosecond infrared laser pulse interacting with the N 2 2 + dication produced by the x-ray pulse. Suppression of molecular fragmentation requires few-femtosecond IR pulses interacting with the system either during or shortly after the arrival of the x-ray pulse. The IR pulse suppresses fragmentation mostly by optically coupling the electronic routes to ultrafast molecular dissociation with electronic channels able to support long-lived vibrational resonances. The effect is strongly dependent on the orientation of the molecule with respect to the polarization axis of the IR field. These calculations are motivated by x-ray pump–IR probe experiments performed at an x-ray free-electron laser [J. M. Glownia et al., Opt. Express 18, 17620 (2010)], where only enhancement of N 2 2 + fragmentation as a function of the pump-probe delay time was reported. The opposite effect reported here becomes apparent when the various electronic channels are considered separately. In practice, this corresponds to a coincident measurement of the energy of the ejected Auger electron

Authors:
 [1];  [2];  [3];  [4]
  1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Univ. of Hamburg (Germany)
  2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Hamburg Centre for Ultrafast Imaging (Germany); Aarhus Univ. (Denmark)
  3. Univ. of Wisconsin, Milwaukee, WI (United States)
  4. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Univ. of Hamburg (Germany); Hamburg Centre for Ultrafast Imaging (Germany)
Publication Date:
Research Org.:
Univ. of Wisconsin, Milwaukee, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1598189
Alternate Identifier(s):
OSTI ID: 1352965
Grant/Contract Number:  
SC0002164
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 95; Journal Issue: 4; Journal ID: ISSN 2469-9926
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Hanna, Athiya Mahmud, Vendrell, Oriol, Ourmazd, Abbas, and Santra, Robin. Laser control over the ultrafast Coulomb explosion of N22+ after Auger decay: A quantum-dynamics investigation. United States: N. p., 2017. Web. doi:10.1103/PhysRevA.95.043419.
Hanna, Athiya Mahmud, Vendrell, Oriol, Ourmazd, Abbas, & Santra, Robin. Laser control over the ultrafast Coulomb explosion of N22+ after Auger decay: A quantum-dynamics investigation. United States. https://doi.org/10.1103/PhysRevA.95.043419
Hanna, Athiya Mahmud, Vendrell, Oriol, Ourmazd, Abbas, and Santra, Robin. 2017. "Laser control over the ultrafast Coulomb explosion of N22+ after Auger decay: A quantum-dynamics investigation". United States. https://doi.org/10.1103/PhysRevA.95.043419. https://www.osti.gov/servlets/purl/1598189.
@article{osti_1598189,
title = {Laser control over the ultrafast Coulomb explosion of N22+ after Auger decay: A quantum-dynamics investigation},
author = {Hanna, Athiya Mahmud and Vendrell, Oriol and Ourmazd, Abbas and Santra, Robin},
abstractNote = {By theoretical calculation, we show the possibility to control and partially suppress the Coulomb explosion of N2 molecules after core-level photoionization by an x-ray laser and subsequent Auger decay. This is achieved by means of a femtosecond infrared laser pulse interacting with the N22+ dication produced by the x-ray pulse. Suppression of molecular fragmentation requires few-femtosecond IR pulses interacting with the system either during or shortly after the arrival of the x-ray pulse. The IR pulse suppresses fragmentation mostly by optically coupling the electronic routes to ultrafast molecular dissociation with electronic channels able to support long-lived vibrational resonances. The effect is strongly dependent on the orientation of the molecule with respect to the polarization axis of the IR field. These calculations are motivated by x-ray pump–IR probe experiments performed at an x-ray free-electron laser [J. M. Glownia et al., Opt. Express 18, 17620 (2010)], where only enhancement of N22+ fragmentation as a function of the pump-probe delay time was reported. The opposite effect reported here becomes apparent when the various electronic channels are considered separately. In practice, this corresponds to a coincident measurement of the energy of the ejected Auger electron},
doi = {10.1103/PhysRevA.95.043419},
url = {https://www.osti.gov/biblio/1598189}, journal = {Physical Review A},
issn = {2469-9926},
number = 4,
volume = 95,
place = {United States},
year = {Mon Apr 24 00:00:00 EDT 2017},
month = {Mon Apr 24 00:00:00 EDT 2017}
}

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Cited by: 10 works
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Works referencing / citing this record:

A pump–probe scheme with a single chirped pulse to image electron and nuclear dynamics in molecules
journal, December 2018


Time-resolved x-ray/optical pump-probe simulations on N 2 molecules
journal, March 2019


Infrared-laser-pulse-enhanced ultrafast fragmentation of $N_2^{2+}$ following Auger decay: Mixed quantum-classical simulations
text, January 2018