Ab initio study of the ground and first excited states of the van der Waals complex ArHF and a possibility of fluorine anion from the excited state

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Ab initio study have been performed for this van der Waals complex ArHF using the multi-reference single and double excitation configuration interaction (MRSDCI) method to determine the spectroscopic constants of the ground and first excited states. The excited state results are found to be new in literature. A possibility of a fluorine anion from the excited ionic state (ArHF)* formed by Ar colliding with an excited ionic state of HF has also been examined.