A detailed investigation of the nonstationary photocurrent in crystals with
a sillenite structure grown in an oxygen-free (argon) atmosphere is perfor
med. Basic parameters of the photoinduced charge carriers in the crystals i
nvestigated, such as the mean carrier lifetime and mobility, the mean photo
conductivity, the carrier diffusion length, and the Debye screening length,
are determined. (C) 1999 American Institute of Physics. [S1063-7850(99)012
05-7].