Molecular Constants and Nuclear-Molecular Interactions ofLi7F19by the Molecular Beam Electric Resonance Method

The electric resonance method of molecular beam spectroscopy was used to observe the ${\mathrm{Li}}^7$ ${\mathrm{F}}^{19}$ spectra arising from transitions of the type $(J, m_J)\to (J, m_{J^{\prime }})$. Data were taken for the (1,0) → (1, ±1) and (2,0) → (2, ±2) transitions for the $v=0\mathrm{}$ and $v=1\mathrm{}$ vibrational states. The latter transitions were observed by a double-quantum process which occurs by the absorption or stimulated emission of two quanta.