A general purpose delay unit and its application to kinetic flash photolysis spectroscopy.

A delay unit is described which is capable of producing time delays of from one microsecond to several milliseconds duration. The delay times may be selected at one microsecond intervals throughout the range. It has been designed to fit this specification but can easily be extended to produce longer delays. By suitable modification shorter delay times and increased time resolution may be obtained. The unit has a totally reproducible performance, is adaptable to other applications and is insensitive to external fields.