Title: On the Hyperfine Structure in the Rotational Spectrum of CuI
Abstract: The observation of the J = 2 ← 1 rotational transition of 63 Cu 127 I at 9 GHz resulted in the determination of the quadrupole coupling constants for 63 Cu : e q 0 Q = 8.14 (20) MHz and 127 I : e q 0 Q= -938.07 (20) MHz.