Тип публикации: статья из журнала
Год издания: 2020
Идентификатор DOI: 10.1103/PhysRevResearch.2.043348
Аннотация: Photodissociation dynamics of the NH molecule excited from the triplet ground X-3 Sigma(-) to 2(3)Pi 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, anПоказать полностьюd the electronic transition operators are refined with respect to the changes of the projection of the total orbital angular momentum onto the molecular axis Delta Lambda. 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.
Журнал: PHYSICAL REVIEW RESEARCH
Выпуск журнала: Vol. 2, Is. 4
Номера страниц: 43348
ISSN журнала: 26431564
Место издания: COLLEGE PK
Издатель: AMER PHYSICAL SOC