Abstract
The temporal evolution of boron oxide (BO) exciplex species in ambient air atmosphere was analyzed spectroscopically. The ro-vibrational bands (RVB) corresponding to BO:B2Σ+ → X2Σ+, BO:A2Πi → X2Σ+, and BO2: A2Πu → X 2Πg transitions were identified from experimentally recorded emission spectra of boric acid pellets. Temporal evolution and temporal intensity decay investigations were conducted on selected RVBs for each transition. The intensity decay rate of electronic transition was found to remain constant, regardless of the vibrational levels in the excited and ground electronic state. The type of the intensity decay profile and the decay rate contents were utilized to understand the extent of the spectral interference from BO: A2Πi - X2Σ+ transition by BO:B2Σ+- X2Σ+and BO2:A2Πu- X 2Πg transitions. By utilizing the Signal-to-envelope ratio, an optimum acquisition delay time was determined for the spectroscopic analysis of various transitions. This research study sheds light on the spectral interferences present in the optical emission spectra of RVBs and provides a comprehensive understanding of the spectral purity of these bands associated with BO exciplex species.
Published Version
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