Knowledge Bank

Laser vaporization of a Pt target rod in the throat of a supersonic expansion of Ar seeded with 1% $SiH4$ has produced the diatomic PtSi in sufficient abundance to allow the $J=1-0$ and $J=2-1$ pure rotational transitions in the $v=0$ level of $\mathrm{<mrow\; data-mjx-texclass="ORD">194</mrow>}Pt28Si,195Pt28Si$, and $\mathrm{<mrow\; data-mjx-texclass="ORD">196</mrow>}Pt28Si$ to be recorded in the $\mathrm{<mrow\; data-mjx-texclass="ORD">1</mrow>}\Sigma +$ ground state. The measured line positions have allowed the rotational constant for each of these isotopic modifications to be determined as $B(194Pt28Si)=4854.3637$ MHz, $B(195Pt28Si)=4851.2175$ MHz, and $B(196Pt28Si)=4848.1152$ MHz. Work is currently under way to determine the dipole moment of PtSi.