Direct-fitting approach to the analysis of high-resolution optical spectra: Monte Carlo and experimental studies of OH A(0)→X(0) spectra

摘要: The traditional approach for analyzing high-resolution optical spectra involves locating and measuring line frequencies, then assigning fitting these to an appropriate model the molecular energy levels. alternative of spectrum directly is particularly appealing in case congested with many overlapped features. capabilities limitations direct are explored application 0–0 band OH A→X transition, as recorded on a charge-coupled-device array using high-pressure Tesla discharge source. Monte Carlo calculations confirm that Poisson (counting) data, parameter errors from variance–covariance matrix trustworthy, unless weights neglected, which error estimates can be wildly optimistic. In actual spectra, major barrier derivation suitable instrumental line-shape function. particular, often adopted triangular slit function grossly inadequate. A systematic procedur...