Titre:	Dynamics and spectroscopy of van der Waals complexes composed of ammonia and noble gases
Auteur(s):	Sette, Camila D’Avila Braga Cunha, Thiago Ferreira da Kiametis, Alessandra Sofia Martins, João Batista Lopes Gargano, Ricardo
Assunto::	Amônia Gases nobres Espectroscopia
Date de publication:	24-avr-2019
Editeur:	Springer Nature
Référence bibliographique:	SETTE, Camila D’Avila Braga et al. Dynamics and spectroscopy of van der Waals complexes composed of ammonia and noble gases. Journal of Molecular Modeling, v. 25, art. n. 126, 2019. Trabalho apresentado no 7º Symposium on electronic structure and molecular dynamics, 2019. DOI: https://doi.org/10.1007/s00894-019-4023-6.
Abstract:	In this work, we calculate the rovibrational energies and spectroscopic constants for the systems formed by ammonia (NH3) and noble gases (Ng=He, Ne, Ar, Kr and Xe). For the spectroscopic constant calculations, we used two different methods: Dunham and another one that use rovibrational energies (here calculated by discrete variable method). In both cases, we used the improved Lennard–Jones potential energy curves (PECs). These PECs, which describe very well van der Waals systems, were built using the dissociation and equilibrium distance obtained from experiments of crossed molecular beams. The spectroscopic constant results, obtained by both methods were in excellent agreement with each other for all NH3-Ng studied systems. Also in relation to NH3-He system, we realize that although this system has a relatively small dissociation energy, it has one vibrational level. Finally, the spectroscopic constants and fundamental rovibrational energy results were used to verify the stability of each system through the lifetime decomposition.
metadata.dc.description.unidade:	Instituto de Química (IQ)
DOI:	https://doi.org/10.1007/s00894-019-4023-6
metadata.dc.relation.publisherversion:	https://link.springer.com/article/10.1007/s00894-019-4023-6
Collection(s) :	Artigos publicados em periódicos e afins

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