TY - JOUR
T1 - 4FNF DOUBLY EXCITED AUTOIONIZING SERIES IN BARIUM
AU - de Graaff, R.J.
AU - Ubachs, W.M.G.
AU - Hogervorst, W.
PY - 1992
Y1 - 1992
N2 - In a two-step pulsed-laser atomic-beam experiment we have studied doubly exicted 4fnf series of barium with energy of 11 eV above the atomic ground state (6s2) and 6 eV above the first ionization limit (6s). Starting from 5d2 3F3, 1G4 metastable states, 4f5/2nf J=26 (9n46) states and 4f7/2nf J=36 (n=19, 20, 21, 25, and 40) states were excited using intermediate 5dnf autoionizing Rydberg states. The 4f5/2nf J=2 6 states strongly interact with 4f7/2nf J=2 6 (8 n 20) and 7pn f J=2 5 (6n 10) states. The excitation spectra were analyzed and interpreted using multichannel quantum-defect theory as well as a limited Slater-Condon analysis. The quantum defects of the 4fnf series are large (0.5 1.4), which is an indication for considerable two-electron correlation effects. © 1992 The American Physical Society.
AB - In a two-step pulsed-laser atomic-beam experiment we have studied doubly exicted 4fnf series of barium with energy of 11 eV above the atomic ground state (6s2) and 6 eV above the first ionization limit (6s). Starting from 5d2 3F3, 1G4 metastable states, 4f5/2nf J=26 (9n46) states and 4f7/2nf J=36 (n=19, 20, 21, 25, and 40) states were excited using intermediate 5dnf autoionizing Rydberg states. The 4f5/2nf J=2 6 states strongly interact with 4f7/2nf J=2 6 (8 n 20) and 7pn f J=2 5 (6n 10) states. The excitation spectra were analyzed and interpreted using multichannel quantum-defect theory as well as a limited Slater-Condon analysis. The quantum defects of the 4fnf series are large (0.5 1.4), which is an indication for considerable two-electron correlation effects. © 1992 The American Physical Society.
U2 - 10.1103/PhysRevA.45.166
DO - 10.1103/PhysRevA.45.166
M3 - Article
SN - 1050-2947
VL - 45
SP - 166
EP - 178
JO - Physical Review A. Atomic, Molecular and Optical Physics
JF - Physical Review A. Atomic, Molecular and Optical Physics
IS - 1
ER -