A quantum-classical simulation of the nuclear dynamics in NO$^-_2$ and C6H$^+_6$ with realistic model Hamiltonian
Subhankar Sardar Amit Kumar Paul Satrajit Adhikari
Click here to view fulltext PDF
Permanent link:
https://www.ias.ac.in/article/fulltext/jcsc/122/04/0491-0510
We perform the nuclear dynamics simulation to calculate the broad band as well as better resolved (a) photodetachment spectra of nitrogen dioxide anion (NO$^-_2$), and (b) photoelectron spectra of benzene radical cation (C6H$^+_6$) with degeneracy among the electronic states using our parallelized time dependent discrete variable representation approach. For this purpose, we first consider a theoretical model that describes the photodetachment spectrum originating due to the Franck-Condon (FC) transition from the anionic ground state to the conically intersecting $\widetilde{X}^2 A_1 - \widetilde{A}^2 B_2$ electronic manifold of the neutral NO2, whereas two multi-state, multi-mode model Hamiltonians of C6H$^+_6$ with degeneracy among the electronic states are explored for its’ photoelectron spectra. The dynamics of C6H$^+_6$ has been carried out with two Hamiltonians: (a) one consists with four states and nine modes, and (b) the other is constituted with three states and seven modes. Since the electronic states of both the systems are interconnected by several conical intersections in the vicinity of the FC region, it would be challenging to persue the dynamical calculation due to the impact of non-adiabaticity among the electronic states. The spectral profiles obtained with the advent of TDDVR approach show reasonably good agreement with the results obtained by other theoretical methodologies and experimental measurements.
Subhankar Sardar1 Amit Kumar Paul1 Satrajit Adhikari1
Volume 135, 2023
All articles
Continuous Article Publishing mode
Click here for Editorial Note on CAP Mode
© 2022-2023 Indian Academy of Sciences, Bengaluru.