Argon solid response upon Rydberg photoexcitation of the NO chromosphore: case of using ab initio potential energy surfaces and comparison to similar studied systems.
Molecular dynamics simulations of NO-doped Ar solid upon Rydberg photoexcitation of the impurity have been carried out taking into account angular dependent potential energy surfaces (PESs) in the ground and excited states. To go beyond isotropic potentials simulations, the effects of anisotropy of potentials on the structure, dynamics, and energetics are investigated by taking into account two cases, namely, the whole PESs and the isotropic parts. Results have been compared to those obtained in previous works for similar NO-doped rare gas systems. Radial distribution functions (RDF) for the ground and excited state indicate that for both cases the shell structure of the lattice is kept ordered and is characterized by well-defined bands. No influence of the anisotropy of potentials has been detected in the RDFs since the anisotropy is rather manifested at short distances. The well part, which has been proven to be unimportant for the dynamics in previous works, arises here to be important for the right simulation of the spectrum. In general, our results show a reasonable agreement with respect to the experimental values for the dynamics and energetics when ab initio potentials are used, although better results can be obtained if higher level ab initio PESs are used.
Castro-Palacio
Juan Carlos
JC
Departamento de Física, Universidad de Pinar del Río. Martí 270, Esq. 27 de Noviembre, Pinar del Río 20100, Cuba. juanc@geo.upr.edu.cu
Ishii
Keisaku
K
Ayala-Mató
Fernando
F
Rubayo-Soneira
Jesús
J
Yamashita
Koichi
K