Thermometry of stored molecular ion beams.

ABSTRACT: The radiative cooling of a stored, initially rotationally hot OH[Formula: see text] ion beam is probed by photodetachment using an electrostatic ion beam trap combined with an in-trap velocity map imaging spectrometer, providing direct measurement of the time-dependent rotational population. The rotational temperatures are estimated from photodetached electron spectra as a function of time using a Boltzmann distribution model and further verified by a rate law model using known Einstein coefficients. We demonstrate that during the entire cooling time, the rotational population can be well described by a Boltzmann distribution.

SUBMITTER: Shahi A 

PROVIDER: S-EPMC9800383 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature