Analysis of the alkali metal diatomic spectra : using molecular beams and ultracold molecules This ebook illustrates the complementarity of molecular beam (MB) spectra and ultracold molecule (UM) spectra in unraveling the complex electronic spectra of diatomic alkali metal molecules using KRb as a prime example. Researchers interested in molecular spectroscopy whether physicist chemist or engineer may find this ebook helpful and may be able to apply similar ideas to their molecules of interest.