Hyperfine interactions in molecules through laser spectroscopy

Abstract

The infrared and millimeter wave spectroscopy, laser Stark spectroscopy, and beam maser spectroscopy of CH₃CN and its isotopic species will be discussed. The beam maser spectroscopy and hyperfine structure of molecules like NCCCD, ClCCD and CH₃CCH are reviewed. The laser magnetic resonance and hyperfine structure in CF, CH and CH₂ free radicals will be discussed. The Lamb dip spectroscopy and laser-induced fluorescence in I2 involving theB ³∏ (0 _u ⁺ ) state are reviewed with special reference to its hyperfine structure. The splitting of the rotational levels of N ₂ ⁺ in itsX ²∑ _g ⁺ andB ²∑ _u ⁺ states due to hyperfine interactions (along with the hyperfine structure) in laser-induced fluorescence in the B-X transition is discussed. Recent results obtained in the laser photo-acoustic spectrum of ICl in the transitionX ¹∑ ⁺ −A ³∏ ₁ will be presented and the possibility of the use of this technique in studying the hyperfine structure will be discussed.