Lifetimes of n = 17, m = 0 Stark-manifold states of Na atoms have been
measured in the static electric fields ranged from 1250 to 2000 V/cm
using delayed electric field ionization (DEFI). The observed lifetimes
of the Stark-manifold states are of the same order of The influences
of applied fields and blackbody radiation on the determination of the
lifetimes were discussed. (C) 1997 Elsevier Science Ltd.