Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1103/PhysRevResearch.4.013066

Аннотация: We investigate the effect of electron-rotation coupling (R-ω coupling) on fs UV photodissociation dynamics of aligned diatomic molecules. We consider the showcase of ground-state MgH+ (1ς+) pumped by an fs IR pulse, which initiates rotational dynamics leading to field-free molecular alignment. A time-delayed fs UV pulse probes the Показать полностьюdegree of alignment of the rotational wave packet in the framework of photodissociation spectroscopy. The molecular alignment correlates directly with the angular distribution of the photofragments in the dissociative 1Π state, as it is shown in our simulations comparing the cases when the R-ω coupling is included and ignored. We show how the angular distribution of the photofragment is strongly affected by the R-ω coupling at various delay times with specific molecular alignment. It was shown that increases of the fs UV pulse intensity and the degree of alignment enhance the effect of R-ω coupling on the angular distribution of the photofragments. On the contrary, an increase of the initial temperature tends to reduce the effect of R-ω coupling, which is explained by the fact that such an effect turns smaller as the increasing of magnetic state |M0| for each initial rotational state J0; furthermore, higher excited rotational state J0 contains more magnetic states M0, and the results have been averaged over all degenerated M0 states. © 2022 authors. Published by the American Physical Society. 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.

Журнал: Physical Review Research

Выпуск журнала: Vol. 4, Is. 1

Номера страниц: 13066

ISSN журнала: 26431564

Издатель: American Physical Society

• Liu Y.R. (School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, China)
• Kimberg V. (Theoretical Chemistry and Biology, Royal Institute of Technology, Stockholm, 10691, Sweden, International Research Center of Spectroscopy and Quantum Chemistry, Siberian Federal University, IRC SQC, Krasnoyarsk, 660041, Russian Federation)
• Wu Y. (Institute of Applied Physics and Computational Mathematics, Beijing, 100088, China, Center for Applied Physics and Technology, Peking University, Beijing, 100084, China)
• Wang J.G. (Institute of Applied Physics and Computational Mathematics, Beijing, 100088, China)
• Vendrell O. (Theoretical Chemistry, Institute of Physical Chemistry, Heidelberg University, Heidelberg, 69120, Germany)
• Zhang S.B. (School of Physics and Information Technology, Shaanxi Normal University, Xi'an, 710119, China)

• Scopus