Laser Spectroscopy and Femtochemistry in Solutions

The use of short light pulses to study rapid chemical reactions in solution dates from the work of Norrish and Porter [15]. In a flash photolysis experiment a light 

The above discussion implies that a laser may be designed with a absorbing system involving two quantum states, namely, the ground state and the excited state. However, an analysis of the rate at which molecules reach the excited state from the ground state with respect to the rate at which molecules in the excited 

When the experimental system emits light after the initial pumping pulse, quite different techniques can be used to obtain a time-resolved spectrum of the sample emission. The simplest of these is time-correlated single photon counting. The time resolution of this technique is limited by the design of the photon detectors. Two other methods used in emission spectroscopy are the streak camera and 

Experimental studies of solution reactions using pulse lasers have blossomed since the 1980s. Important examples are considered in the following discussion. 

The fluorescence spectra are analyzed to obtain the correlation function C(t) defined as 

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