Institution: | (1) Abteilung Laserphysik, Max-Planck-Institut für biophysikalische Chemie, D-3400 Göttingen, Fed. Rep. Germany;(2) Present address: Lambda Physik GmnHCo., Postfach 2663, D-3400 Göttingen, Fed. Rep. Germany;(3) Present address: P. N. Lebedev Physical Institute, Academy of Sciences of the USSR, Leninsky prospect 53, SU-117924 Moscow, USSR |