## Abstract

Optical-optical double-resonance spectroscopy has been used to record a high-resolution spectrum of the (C) over tilde (2) Pi (000)-(A) over tilde (2) Pi (000) transition of SrOH. Rotational and fine structure parameters have been determined for the (C) over tilde (2)Pi state through a combined least-squares fit with the (A) over tilde (2)Pi-(X) over tilde (2)Sigma(+) optical transition data and the millimeter-wave pure rotational data of the (X) over tilde (2)Sigma(+) state. The spin-orbit constant of the (C) over tilde (2)Pi state was found to be 24.6607 cm(-1), which is significantly smaller than in the (A) over tilde (2)Pi state. This change call be rationalized by the different atomic orbital character of the (A) over tilde (2)Pi and (C) over tilde (2)Pi states. The values of the Lambda-doubling constants in the (C) over tilde (2)Pi state have been examined in terms of the pure procession model. The agreement between the calculated and observed Lambda-doubling constants suggests that the (C) over tilde (2)Pi state may form a unique perturber pair with the nearby (D) over tilde (2)Sigma(+) state. (C) 2005 Elsevier Inc. All Fights reserved.

Original language | English |
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Pages (from-to) | 21-28 |

Number of pages | 8 |

Journal | JOURNAL OF MOLECULAR SPECTROSCOPY |

Volume | 236 |

Issue number | 1 |

DOIs | |

Publication status | Published - Mar 2006 |

## Keywords

- SrOH
- optical-optical double-resonance
- alkaline-earth containing molecules
- MILLIMETER-WAVE SPECTRUM
- RESOLUTION LASER SPECTROSCOPY
- LIGAND-FIELD APPROACH
- ROTATIONAL ANALYSIS
- DYE-LASERS
- STATES
- CAF
- SYSTEM
- MOLECULES
- DEPERTURBATION