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Title: Probing strong-field electron-nuclear dynamics of polyatomic molecules using proton motion

Abstract

Proton ejection during Coulomb explosion is studied for several structure-related organic molecules (anthracene, anthraquinone, and octahydroanthracene) subjected to 800 nm, 60 fs laser pulses at intensities from 0.50 to 4.0x10{sup 14} W cm{sup -2}. The proton kinetic energy distributions are found to be markedly structure specific. The distributions are bimodal for anthracene and octahydroanthracene and trimodal for anthraquinone. Maximum (cutoff) energies of the distributions range from 50 eV for anthracene to 83 eV for anthraquinone. The low-energy mode ({approx}10 eV) is most pronounced in octahydroanthracene. The dependence of the characteristic features of the distributions on the laser intensity provides insights into molecular specificity of such strong-field phenomena as (i) nonadiabatic charge localization and (ii) field-mediated restructuring of polyatomic molecules polarized by a strong laser field.

Authors:
; ;  [1];  [2]
  1. Department of Chemistry, Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122 (United States)
  2. Department of Physics, Center for Advanced Photonics Research, Temple University, Philadelphia, Pennsylvania 19122 (United States)
Publication Date:
OSTI Identifier:
20982544
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.75.053402; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANTHRACENE; ANTHRAQUINONES; DISSOCIATION; DISTRIBUTION; ELECTRONS; EV RANGE; LASER RADIATION; MOLECULAR STRUCTURE; MOLECULES; PHOTOLYSIS; PHOTON-MOLECULE COLLISIONS; PROTONS; PULSES

Citation Formats

Markevitch, Alexei N., Smith, Stanley M., Levis, Robert J., and Romanov, Dmitri A.. Probing strong-field electron-nuclear dynamics of polyatomic molecules using proton motion. United States: N. p., 2007. Web. doi:10.1103/PHYSREVA.75.053402.
Markevitch, Alexei N., Smith, Stanley M., Levis, Robert J., & Romanov, Dmitri A.. Probing strong-field electron-nuclear dynamics of polyatomic molecules using proton motion. United States. doi:10.1103/PHYSREVA.75.053402.
Markevitch, Alexei N., Smith, Stanley M., Levis, Robert J., and Romanov, Dmitri A.. Tue . "Probing strong-field electron-nuclear dynamics of polyatomic molecules using proton motion". United States. doi:10.1103/PHYSREVA.75.053402.
@article{osti_20982544,
title = {Probing strong-field electron-nuclear dynamics of polyatomic molecules using proton motion},
author = {Markevitch, Alexei N. and Smith, Stanley M. and Levis, Robert J. and Romanov, Dmitri A.},
abstractNote = {Proton ejection during Coulomb explosion is studied for several structure-related organic molecules (anthracene, anthraquinone, and octahydroanthracene) subjected to 800 nm, 60 fs laser pulses at intensities from 0.50 to 4.0x10{sup 14} W cm{sup -2}. The proton kinetic energy distributions are found to be markedly structure specific. The distributions are bimodal for anthracene and octahydroanthracene and trimodal for anthraquinone. Maximum (cutoff) energies of the distributions range from 50 eV for anthracene to 83 eV for anthraquinone. The low-energy mode ({approx}10 eV) is most pronounced in octahydroanthracene. The dependence of the characteristic features of the distributions on the laser intensity provides insights into molecular specificity of such strong-field phenomena as (i) nonadiabatic charge localization and (ii) field-mediated restructuring of polyatomic molecules polarized by a strong laser field.},
doi = {10.1103/PHYSREVA.75.053402},
journal = {Physical Review. A},
number = 5,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}