Wilhelmus Leonardus Meerts, Johannes Jacobus van Vaals and Antoni Dymanus connected precision molecular spectroscopy with structural inference in potassium cyanide. The experiment resolved rotational and hyperfine structure in several isotope-substituted species. Rotational constants constrain moments of inertia, while hyperfine structure supplies additional information about local electronic and nuclear interactions. Agreement across these different measurements is a stronger test of the molecular geometry than fitting one isolated spectral line.[ref]
High Resolution Molecular Beam Study of Alkali Cyanides by Johannes Jacobus van Vaals. Chapter III, pp. 27–48: experimental spectrum, isotopic comparisons and structure
A physicist working in spectroscopy and a chapter III coauthor of High Resolution Molecular Beam Study of Alkali Cyanides by Johannes Jacobus van Vaals.[ref]
Identity: Title page: Wilhelmus Leonardus Meerts
Institutional profile: www.ru.nl/en/people/meerts-w
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