TY - JOUR
T1 - Interference effects in the autoionization of 4F7H and 6DNI states of Barium
AU - van Leeuwen, R.
AU - Ubachs, W.M.G.
AU - Hogervorst, W.
AU - Aymar, M.
AU - Luckoenig, E.
PY - 1995
Y1 - 1995
N2 - In a two-step pulsed laser experiment 4f5/27h J=4,5,6, autoionizing levels of Ba were excited. The 4f5/27h levels interact with 6d5/2ni levels resulting in complex interference patterns. The excitation spectra were calculated using the eigenchannel R-matrix method in combination with multichannel quantum-defect theory. These R-matrix calculations reproduce the excitation spectra, including the interference patterns which involve q-reversal and stabilization against autoionization in the 6d5/2ni series, very well. The excitation spectra for J=5 are also analyzed using a phase-shifted R-matrix model in which only three channels had to be included to reproduce the main experimental features. The three-channel model clearly shows that the stabilization against autoionization in the 6d5/2ni Rydberg series is a result of interference in the decay of 4f5/27h and 6d5/2ni levels, autoionizing into the same 6d3/2i continuum. © 1995 The American Physical Society.
AB - In a two-step pulsed laser experiment 4f5/27h J=4,5,6, autoionizing levels of Ba were excited. The 4f5/27h levels interact with 6d5/2ni levels resulting in complex interference patterns. The excitation spectra were calculated using the eigenchannel R-matrix method in combination with multichannel quantum-defect theory. These R-matrix calculations reproduce the excitation spectra, including the interference patterns which involve q-reversal and stabilization against autoionization in the 6d5/2ni series, very well. The excitation spectra for J=5 are also analyzed using a phase-shifted R-matrix model in which only three channels had to be included to reproduce the main experimental features. The three-channel model clearly shows that the stabilization against autoionization in the 6d5/2ni Rydberg series is a result of interference in the decay of 4f5/27h and 6d5/2ni levels, autoionizing into the same 6d3/2i continuum. © 1995 The American Physical Society.
U2 - 10.1103/PhysRevA.52.4567
DO - 10.1103/PhysRevA.52.4567
M3 - Article
SN - 1050-2947
VL - 52
SP - 4567
EP - 4577
JO - Physical Review A. Atomic, Molecular and Optical Physics
JF - Physical Review A. Atomic, Molecular and Optical Physics
IS - 6
ER -