• Open Access

Photodissociation dynamics of the NH molecule under intense VUV pulses

Yan Rong Liu, Yong Wu, Jian Guo Wang, Oriol Vendrell, Victor Kimberg, and Song Bin Zhang
Phys. Rev. Research 2, 043348 – Published 9 December 2020

Abstract

Photodissociation dynamics of the NH molecule excited from the triplet ground X3Σ to 23Π state by resonant intense VUV pulses have been comprehensively investigated by the recently proposed theoretical treatment involving the electron-rotation coupling. The rotational dynamics are described by the Wigner D functions, and the electronic transition operators are refined with respect to the changes of the projection of the total orbital angular momentum onto the molecular axis ΔΛ. The kinetic energy release (KER) spectra and the angular distribution of photofragments are obtained by averaging over nine degenerate initial angular states, computed separately. We have shown that the KER spectra are not very sensitive to the electron-rotation coupling for different pulse intensity and energy detuning from the resonance. The angular distribution of the photofragments, on the contrary, is strongly affected by the electron-rotation coupling at the small angles between the molecular axis and laser polarization. The influence of the electron-rotational coupling shows different trends for positive and negative detunings from the resonance at variation of the pulse intensity, which is explained by sufficient changes of the rotational wave packet dynamics caused by different phases of the initial rotational states.

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  • Received 2 November 2020
  • Accepted 18 November 2020

DOI:https://doi.org/10.1103/PhysRevResearch.2.043348

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Yan Rong Liu1, Yong Wu2,3, Jian Guo Wang2, Oriol Vendrell4, Victor Kimberg5,6, and Song Bin Zhang1,*

  • 1School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China
  • 2Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • 3Center for Applied Physics and Technology, Peking University, Beijing 100084, China
  • 4Theoretical Chemistry, Institute of Physical Chemistry, Heidelberg University, 69120 Heidelberg, Germany
  • 5Theoretical Chemistry and Biology, Royal Institute of Technology, Stockholm 10691, Sweden
  • 6Siberian Federal University, 660041 Krasnoyarsk, Russia

  • *song-bin.zhang@snnu.edu.cn

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Vol. 2, Iss. 4 — December - December 2020

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