TY - JOUR
T1 - Fine structure of Ca-, Sr-, Ba-, and Ra- from the many-body theory calculation
AU - Dzuba, V. A.
AU - Gribakin, G. F.
PY - 1997/3/1
Y1 - 1997/3/1
N2 - Atomic many-body theory methods are used to calculate the fine structure of negative ions formed by binding a p electron into an open shell, Ca-, Sr-, Ba-, and Ra-. This binding is due to a strong correlation potential acting between the electron and the neutral atom. Comparison with experimental data shows that the second order many-body perturbation theory calculation overestimates the correlation potential by 10% to 15%. Scaling factors are introduced in the correlation potential to reproduce experimental binding energies of the lower p1/2 components. This procedure yields fine-structure intervals in excellent agreement with experiment for Ca-, Sr-, and Ba-, and allows us to predict that in Ra- the p1/2 state is bound by 100 meV, and p3/2 is a resonance at 16 meV in the continuum.
AB - Atomic many-body theory methods are used to calculate the fine structure of negative ions formed by binding a p electron into an open shell, Ca-, Sr-, Ba-, and Ra-. This binding is due to a strong correlation potential acting between the electron and the neutral atom. Comparison with experimental data shows that the second order many-body perturbation theory calculation overestimates the correlation potential by 10% to 15%. Scaling factors are introduced in the correlation potential to reproduce experimental binding energies of the lower p1/2 components. This procedure yields fine-structure intervals in excellent agreement with experiment for Ca-, Sr-, and Ba-, and allows us to predict that in Ra- the p1/2 state is bound by 100 meV, and p3/2 is a resonance at 16 meV in the continuum.
U2 - 10.1103/PhysRevA.55.2443
DO - 10.1103/PhysRevA.55.2443
M3 - Article
SN - 1050-2947
VL - 55
SP - 2443
EP - 2446
JO - Physical Review A (Atomic, Molecular, and Optical Physics)
JF - Physical Review A (Atomic, Molecular, and Optical Physics)
ER -