K-FLUORESCENCE YIELDS AND LEVEL WIDTHS, IN THE PRESENCE OF AN L-SPECTATOR HOLE

The K partial and total fluorescence yields of lanthanum, in the prese nce of a spectator hole in one of the three L subshells, are discussed . It is shown that the K partial fluorescence yield can change conside rably in the presence of the L spectator hole. Dirac-Fock wavefunction s have been used for the calculation of the dipole radiative transitio n rates. A statistical weighting semi-empirical formula for the calcul ation of the relative K radiative rates is proposed, which permits the evaluation of the relative K radiative rates in the presence of spect ator hole(s), for middle and high Z elements, with high accuracy. Fina lly the lifetime of a K hole in a KL hole atomic configuration is calc ulated and is compared with the lifetime of a K hole in a single K hol e atomic configuration. It is shown that the lifetime of the K hole is affected by the presence of the L hole and it depends on the particul ar L subshell.