Institute of Theoretical Physics · Faculty of Mathematics and Physics, Charles University
Phys. Rev. A 102(6), 062822 (2020)
In a combined experimental and theoretical study, we probe the vibrational excitation of isocyanic acid induced by electron impact in the energy range up to 5 eV. Experimentally, we report differential elastic and vibrationally inelastic cross sections at the scattering angle of 135◦. Theoretically, we characterize the involved resonant states using a regularized analytical continuation method. We also apply a nonlocal resonance model to calculate cross sections for the vibrational mode that involves the N-H stretching motion. The model reproduces all the features observed in the experiment: efficient excitation at the threshold, sharp cusps in the excitation functions, and the formation of an A' shape resonance. There is a second (A'') resonance visible in the spectra; however, it excites
only selected vibrational modes. The origins of this selectivity are discussed.
@article{UTF841,
author = {Ragesh Kumar T. P. , P. Nag , M. Ranković , R. Čurík, A. Knížek , S. Civiš , M. Ferus, J. Trnka , K. Houfek , M. Čížek , and J. Fedor},
title = {{Electron-impact vibrational excitation of isocyanic acid HNCO}},
journal = {Phys. Rev. A},
volume = {102},
number = {6},
pages = {062822},
year = {2020},
doi = {10.1103/PhysRevA.102.062822},
}