No abstract

OH spectroscopy has been heavily studied due to its importance in combustion, atmospheric and interstellar chemistry, and as a key constituent of the Earth's atmosphere. Recently, OH has been detected in the atmosphere of the Ulta-Hot Jupiter WASP-76b and has also been found in the stellar spectra of M-dwarfs a . Novel MolPro electronic structure calculations for ground and excited electronic state PECs will be presented along with associated coupling curves and (transition) dipole moments. These ab initio calculations are used to produce a ExoMol rovibronic linelist using the programs Duo and ExoCross. Photodissociation is a primary destructor of OH in diffuse interstellar clouds, particularly the direct X 2 Π → 1 2 Σ − photodissociation. A 2 Σ + predissociation is also studied. Temperature-dependent photodissociation cross sections using the method established by Pezzella et al. b are calculated and presented. Gaussian line profile optimization of photodissociation cross sections has been automated and applied to the cases of direct photodissociation for OH, HCl, and HCN.

Organic farming owes its emergence, existence and principles to the nature itself, while the fundamental rule of its practice is to be in harmony with it, without harming it. In fact, it is a new perception of the environment and a new attitude towards its protection, both now and in the future. Organic farming combines the best environmental practices, high biodiversity, the conservation of natural resources and high production standards based on natural substances and processes. It also corresponds to a specific market that responds to specific consumer demands while at the same time it provides public goods that are in terms with environmental protection, animal welfare and rural development.

Sodium oxide (NaO) is observed in airglows in the Earth's atmosphere and likely has astronomical importance. This study concerns the transitions with X 2 Π and and to the very low-lying (T 0 < 2000 cm −1 ) A 2 Σ + state. A line list consisting of energy levels, allowed transitions, Einstein coefficients, and a partition function are produced based on variational solution of the coupled rovibronic Schrödinger equations using program Duo a . Ab initio calculations which characterized the potential energy, spin-orbit, Λ-doubling and (transition) dipole moment curves were used as starting points to form the final model. Ab initio PECs were parameterized using Morse potentials and improved by least-squares fitting to experimental data on the rotational spectrum by Yamada et al b and the electronic spectrum by Joo et al c . A lack of data detailing the dissociation energies and vibrational structure of the X and A states prompts a request for further experimental study into the species which would allow further improvement of the model.