TY - JOUR

T1 - Calculations of low-lying P1 states of the beryllium atom

AU - Bubin, Sergiy

AU - Adamowicz, Ludwik

PY - 2009/2/2

Y1 - 2009/2/2

N2 - High-accuracy nonrelativistic variational calculations employing explicitly correlated Gaussian basis functions have been performed to determine the energies and the expectation values of some operators for the lowest four P11 states of the beryllium atom. The states correspond to the electron configurations 1 s2 2 s1 n p1, where n=2, 3, 4, and 5. The calculations were performed for both finite and infinite mass of the Be nucleus. The basis set for each state was grown to the level of 5000 Gaussians. With that many functions we achieved a tight energy convergence. The reported values, to the best of our knowledge, are the most accurate ever obtained for the four states.

AB - High-accuracy nonrelativistic variational calculations employing explicitly correlated Gaussian basis functions have been performed to determine the energies and the expectation values of some operators for the lowest four P11 states of the beryllium atom. The states correspond to the electron configurations 1 s2 2 s1 n p1, where n=2, 3, 4, and 5. The calculations were performed for both finite and infinite mass of the Be nucleus. The basis set for each state was grown to the level of 5000 Gaussians. With that many functions we achieved a tight energy convergence. The reported values, to the best of our knowledge, are the most accurate ever obtained for the four states.

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U2 - 10.1103/PhysRevA.79.022501

DO - 10.1103/PhysRevA.79.022501

M3 - Article

AN - SCOPUS:60349117413

SN - 1050-2947

VL - 79

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

IS - 2

M1 - 022501

ER -