Precursor state of chemi-ionization reactions and confinement of valence electrons by anisotropic intermolecular forcesStefano Falcinelli, Franco Vecchiocattivi, Simonetta Cavalli and Fernando PiraniEur. Phys. J. D, 75 3 (2021) 94DOI: https://doi.org/10.1140/epjd/s10053-021-00113-8