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Title: Three-dimensional potential energy surfaces of ArNO ($$\tilde{X}$$2Π)

Journal Article · · Journal of Chemical Physics
DOI: https://doi.org/10.1063/1.5145011 · OSTI ID:1630885

Until now, the potential energy surfaces (PESs) of the ArNO complex found in the literature were two-dimensional, with the NO interatomic distance being fixed. In this work, we present the first accurate three-dimensional ground state X 2 Π PESs (both A' and A") of ArNO computed at the CCSD(T)/CBS level of theory. The equilibrium geometries and the well depths (De) are compared to several other electronic structure methods. We found that using the multireference method, MRCI-F12 makes the surfaces much shallower (by 25%) and the depth of the surfaces does not agree with experimental data. The explicitly correlated coupled-cluster method underestimates the well depth as well. Analytic representations for both A' and A" surfaces were fit to 4380 ab initio points to within 2.71 cm-1.A three-dimensional Numerov propagator method in Delves coordinates is used to compute the bound state spectrum up to Jtot = 6.5. The recommended dissociation energies are D0 = 97.2 cm-1 for the adiabatic ground state and De = 133.7 (128.1) cm-1 for A' (A")

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1630885
Alternate ID(s):
OSTI ID: 1605611
Report Number(s):
LA-UR-20-20133; TRN: US2200950
Journal Information:
Journal of Chemical Physics, Vol. 152, Issue 11; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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