Oxygen-17 hyperfine structures in the pure rotational spectra of SrO, SnO, BaO, HfO and ThO

Abstract

Hyperfine structures arising from the couplings of the nuclear spin angular momentum of (17)O (I = 5/2) with the end over end rotation of several metal-containing diatomic monoxides have been observed using a Fourier transform microwave spectrometer. The molecules have been produced by reacting (17)O(2) with laser ablated metal atoms. The oxygen-17 nuclear quadrupole coupling constants have been determined for the title molecules and are interpreted in terms of a simple Townes-Dailey model. Also, the oxygen-17 nuclear spin-rotation constants have been determined and used to calculate the oxygen-17 shieldings for each molecule.

The 115Sn, 117Sn and 119Sn nuclear spin-rotation constants in stannous monoxide, SnO, and a new multi-isotopomer analysis

“…We have also included the recently recorded J = 1-0 rotational transition for 120 Sn 17 O [4]. The J = 1-0 rotational transition for 120 Sn 17 O displayed 17 O nuclear quadupole hyperfine structure, however using the constants of Ref.…”

“…Although SnO has been the subject of four prior microwave studies [1][2][3][4] and a high resolution infrared study [5], this type of hyperfine detail has not been observed. This is likely due to the high resolution required to observe magnetic hyperfine structure for diamagnetic species and also the low abundance of the odd-atomic-mass Sn isotopes.…”

“…These data have been used to obtain shielding parameters for the relevant nuclei. We have combined our data with all of the prior high resolution data for SnO [1][2][3][4][5] and performed a multi-isotopomer analysis.…”

The pure rotational spectrum of thorium monosulfide, ThS

“…In addition to obtaining very accurate molecular constants, these measurements demonstrate that the sensitive and versatile PPMODR technique can be readily applied to heavy element compounds over a wide frequency range. Prior to the results reported here, the only actinide containing molecules for which rotational transitions had been reported were ThO [5][6][7] and UO [8].…”

Communication: The permanent electric dipole moment of thorium monoxide, ThO

“…While there have been several spectroscopic studies of the ground and low-lying electronic states, [3][4][5][6][7][8] In the present study we have measured the Stark effect for numerous branch features of the E(0 We also analyze the field-free spectrum to derive the bond distances for the E(0…”