Rotational structure of the 000, 010, 100, 020, and 001 vibrational states of the D2 16O molecule: Spectroscopic assignment of rotational levels up to J, K a = 30 and analysis of published data

The complete spectroscopic assignment of calculated Partridge-Schwenke rotational energy levels up to J, K a = 30 is presented for the 000, 010, 100, 020, and 001 vibrational states of the D2 16O molecule. The nonpolynomial model of an effective rotational Hamiltonian is used to perform the assignment and to analyze the experimental energy levels available in the literature for these states. The results obtained are compared with the data calculated by other authors. The results of this study can be useful in searching for and identifying new, highly excited rotational levels of D2 16O, as well as in creating the databases of parameters of rovibrational transitions of the water molecule.