Jonathan Tennyson

TL;DR: In this paper, the vibrational bound states of the H C 3 and D2H C molecular ions were characterized using a realistic ab initio potential energy surface. And the role of these states in the HC 3 system and other molecules is discussed.

TL;DR: A new R-matrix formalism is presented for tackling problems involving low- and ultra-low energy collisions, which builds on the progress made in variational calculations of molecular spectra to provide wavefunctions for the whole system at short internuclear distances.

TL;DR: In this article, the authors compare the ExoMol-C2018 data set with spectra calculated from previous sources to demonstrate its advantages, and conclude that at the present time, the current data set provides the most reliable ammonia absorption source for analysing low-to medium-resolution spectra of Jupiter in the visible/near-IR spectral range, but note that the data are less able to model high resolution spectra owing to small, but significant inaccuracies in the line wavenumber estimates.

TL;DR: The molecular R-matrix method has been used to perform ab initio positron-N2 scattering calculations in the fixed-nuclei approximation for 12 internuclear geometries ranging from 16 to 29 a0 as discussed by the authors.

TL;DR: A review of the state-of-the-art in these fields can be found in this article, where the authors present a detailed discussion of the current state of the art in the field of rotation-vibration spectrum analysis.