DOUBLE-BEAM LASER SPECTROMETER OF NANOSECOND RESOLUTION

The paper describes the design and performance of a double-beam pulse spectrometer used for measuring in the real time, changes in transient absorption, evolution of emission and dynamics of the ground state de pletion of molecular media. The technique of digital recording and dat a processing at the sampling rate of 2 gigasamples/s ensures a resolut ion of single nanoseconds in the time interval of up to 10 mu s. The s pectrometer has been successfully tested in photophysical studies of t he triplet states of xanthione in benzene and n-hexane solutions.