# ROVIBRATIONAL CHARACTERIZATION OF X$^{2}\Sigma^{+}$ $^{11}$BH$^{+}$ BY THE EXTRAPOLATION OF PHOTOSELECTED HIGH-RYDBERG SERIES IN $^{11}$BH

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 Title: ROVIBRATIONAL CHARACTERIZATION OF X$^{2}\Sigma^{+}$ $^{11}$BH$^{+}$ BY THE EXTRAPOLATION OF PHOTOSELECTED HIGH-RYDBERG SERIES IN $^{11}$BH Creators: Viteri, C. Ricardo; Gilkison, Andrew T.; Rixon, Scott J.; Grant, Edward R. Issue Date: 2006 Abstract: Optical-optical-optical triple resonance spectroscopy of $^{11}$BH isolates high-Rydberg states that form series converging to rotational state specific ionization potentials in the vibrational levels of $^{11}$BH$^{+}$ from $v^{+} = 0$ through $4$. Limits defined by a comprehensive fit of these series to state-detailed thresholds yield rovibrational constants describing the X$^{2}\Sigma^{+}$ state of $^{11}$BH$^{+}$. The data provide a first determination of the vibration-rotation interaction parameter ${\alpha}_{e} = 0.4821$cm$^{-1}$ and a more accurate estimate of ${\omega}_{e} = 2526.58$cm$^{-1}$ together with the higher-order anharmonic terms ${\omega}_{e}x_{e} = 61.98$cm$^{-1}$ and ${\omega}_{e}y_{e} = -1.989$cm$^{-1}$. The deperturbation and global fit of series to state-detailed limits also yields a precise value of the adiabatic ionization potential of $^{11}$BH of $79120.3(1)$cm$^{-1}$, or $9.81033(1)$eV.$\;$ High precision is afforded here by the use of graphical analysis techniques, narrow bandwidth laser systems, and an analysis of newly observed, high-principal quantum number Rydberg states that conform well with a Hund's case (d) electron-core coupling limit. URI: http://hdl.handle.net/1811/30911 Other Identifiers: 2006-MI-08