One-to-Two Millimeter Wave Spectroscopy. III. NO and DI

Abstract

Pure rotational transitions of ${\mathrm{N}}^{14}$ ${\mathrm{O}}^{16}$ and D${\mathrm{I}}^{127}$ have been measured in the one-to-two millimeter wave region. For NO the $J=\frac{1}{2}\to \frac{3}{2}$ transition in the ${}_{}{}^2{}_{}{}^{}\pi _{\frac{1}{2}}^{}{}_{}{}^{}$ electronic ground state was observed. The transition reveals a $\Lambda$ doublet with separation $\Delta {\nu }_{\mathrm{dc}}=355.1\mathrm{}$ Mc/sec. Each component of the $\Lambda$ doublet is further split into five hyperfine components as a result of the nuclear magnetic coupling of ${\mathrm{N}}^{14}$. Nuclear quadrupole coupling of ${\mathrm{N}}^{14}$ was found to be small in comparison with the magnetic interaction. Analysis of the data yields $B_0=50818.0\mathrm{}$ Mc/sec, $r_0=1.1540\mathrm{}$ A, ${\mathrm{B}}_e=51084.8\mathrm{}$ Mc/sec, and ${\mathrm{r}}_e=1.1510\mathrm{}$ A for the ${}_{}{}^2{}_{}{}^{}\Pi _{\frac{1}{2}}^{}{}_{}{}^{}$ state. For D${\mathrm{I}}^{127}$ the following information was obtained: $B_0=97\mathrm{} 537.2$ Mc/sec, $r_0=1.6165\mathrm{}$ A, and $eQq\left({\mathrm{I}}^{127}\right)=1823\mathrm{}\pm 1$ Mc/sec. Nuclear magnetic interactions of ${\mathrm{I}}^{127}$ were also detected and analyzed.