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Title: Theoretical investigation of the origin of the multipeak structure of kinetic-energy-release spectra from charge-resonance-enhanced ionization of H{sub 2}{sup +} in intense laser fields

Abstract

The dynamics of hydrogen molecular ions in intense laser pulses (100 fs, I = 0.77 x 10{sup 14} W/cm{sup 2} to 2.5 x 10{sup 14} W/cm{sup 2}) has been studied, and the kinetic-energy-release spectra of Coulomb explosion channel have been calculated by numerically solving the time-dependent Schroedinger equation. In a recent experiment, a multipeak structure from charge-resonance-enhanced ionization is interpreted by a vibrational 'comb' at a critical nuclear distance. We found that the peaks could not be attributed to a single vibrational level but a collective contribution of some typical vibrational states in our calculated Coulomb explosion spectra, and the main peak shifts toward the low-energy region with increasing vibrational level, which is also different from the explanation in that experiment. We have also discussed the proton's kinetic-energy-release spectra for different durations with the same laser intensity.

Authors:
;  [1];  [2];  [3]; ; ;  [1]
  1. State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China)
  2. (China)
  3. Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094 (China)
Publication Date:
OSTI Identifier:
22068737
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; AUGMENTATION; DISTANCE; HYDROGEN; HYDROGEN IONS 2 PLUS; IONIZATION; KINETIC ENERGY; LASER RADIATION; LASERS; PROTONS; PULSES; RESONANCE; SCHROEDINGER EQUATION; SPECTRA; TIME DEPENDENCE; VIBRATIONAL STATES

Citation Formats

He Haixiang, Guo Yahui, China and Graduate School of the Chinese Academy of Sciences, Beijing, 10039, Lu Ruifeng, Zhang Peiyu, Han Keli, and He Guozhong. Theoretical investigation of the origin of the multipeak structure of kinetic-energy-release spectra from charge-resonance-enhanced ionization of H{sub 2}{sup +} in intense laser fields. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.033418.
He Haixiang, Guo Yahui, China and Graduate School of the Chinese Academy of Sciences, Beijing, 10039, Lu Ruifeng, Zhang Peiyu, Han Keli, & He Guozhong. Theoretical investigation of the origin of the multipeak structure of kinetic-energy-release spectra from charge-resonance-enhanced ionization of H{sub 2}{sup +} in intense laser fields. United States. doi:10.1103/PHYSREVA.84.033418.
He Haixiang, Guo Yahui, China and Graduate School of the Chinese Academy of Sciences, Beijing, 10039, Lu Ruifeng, Zhang Peiyu, Han Keli, and He Guozhong. Thu . "Theoretical investigation of the origin of the multipeak structure of kinetic-energy-release spectra from charge-resonance-enhanced ionization of H{sub 2}{sup +} in intense laser fields". United States. doi:10.1103/PHYSREVA.84.033418.
@article{osti_22068737,
title = {Theoretical investigation of the origin of the multipeak structure of kinetic-energy-release spectra from charge-resonance-enhanced ionization of H{sub 2}{sup +} in intense laser fields},
author = {He Haixiang and Guo Yahui and China and Graduate School of the Chinese Academy of Sciences, Beijing, 10039 and Lu Ruifeng and Zhang Peiyu and Han Keli and He Guozhong},
abstractNote = {The dynamics of hydrogen molecular ions in intense laser pulses (100 fs, I = 0.77 x 10{sup 14} W/cm{sup 2} to 2.5 x 10{sup 14} W/cm{sup 2}) has been studied, and the kinetic-energy-release spectra of Coulomb explosion channel have been calculated by numerically solving the time-dependent Schroedinger equation. In a recent experiment, a multipeak structure from charge-resonance-enhanced ionization is interpreted by a vibrational 'comb' at a critical nuclear distance. We found that the peaks could not be attributed to a single vibrational level but a collective contribution of some typical vibrational states in our calculated Coulomb explosion spectra, and the main peak shifts toward the low-energy region with increasing vibrational level, which is also different from the explanation in that experiment. We have also discussed the proton's kinetic-energy-release spectra for different durations with the same laser intensity.},
doi = {10.1103/PHYSREVA.84.033418},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}