Knowledge Bank

The microwave spectra of three indium (I) halides have been investigated at high resolution using a microwave Fourier transform (MWFT) cavity spectrometer. InF, InCl, and InBr were produced by laser ablation of an indium rod in the presence of gas mixtures containing $SF6,Cl2$, and $Br2$, respectively. The spectra have been analyzed in order to refine known values for the nuclear quadrupole coupling constants, as well as to obtain previously undetermined nuclear spin-rotation coupling constants. In particular, $\mathrm{<mrow\; data-mjx-texclass="ORD">19</mrow>}F$ spin-rotation splitting has been observed in the $J=1-0$ rotational transition of $\mathrm{<mrow\; data-mjx-texclass="ORD">115</mrow>}In19F$.