RESONANT WIDTH AND ENERGY DETERMINED BY PHOTOIONIZATION FROM EXCITED DIVALENT ATOMS

Explicit examples are presented to illustrate the presence of a more s ymmetric resonant structure in spectra from bound excited states of a divalent atom. Comparison between the theoretical ground-state and bou nd excited-state photoelectron spectra shows that both the resonant en ergy E(r) and the resonant width GAMMA of a doubly excited autoionizat ion state of a divalent atom (e.g., alkaline-earth-metal atom) can be determined experimentally from photoionization originated from a bound excited state more effectively.