Submillimeter spectroscopy of H$_2$C$^{17}$O and a revisit of the rotational spectra of H$_2$C$^{18}$O and H$_2$C$^{16}$O

Abstract

The rotational spectrum of the formaldehyde isotopologue H 2 C 17 O was investigated between 0.56 and 1.50 THz using a sample of natural isotopic composition. In addition, transition frequencies were determined for H 2 C 18 O and H 2 C 16 O between 1.37 and 1.50 THz. The data were combined with critically evaluated literature data to derive improved sets of spectroscopic parameters which include 17 O or H nuclear hyperfine structure parameters.