{c}

<James M. McCormick> coauthored research on <rotational spectroscopy>.<Vibrational-Rotational Spectroscopy of HCl by James M. McCormick>[publication title and author list]{ref}

<Rotational spectroscopy> measures transitions between <molecular rotation> <quantum states>, usually in low-pressure gaseous <molecules>. The measured <spectral lines> become a molecular fingerprint only after <rotational spectral line assignment>: identify which transitions belong together, determine their <quantum numbers>, fit a rotational <Hamiltonian>, and test additional predictions. Line positions constrain <moments of inertia>, while <rotational state populations> and transition coupling determine which lines can be detected.


 James M. McCormick (source code)