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Equipment

    9. Nanosecond Transient Absorption Spectrometer

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Technique 

The setup uses a high intensity laser pulse to produce a long-lived excited state in the sample. The perturbation in the sample causes a change in the absorption intensity over a short period of time. These changes are probed with a pulsed xenon source lamp.

Units

Q-switched Nd-YAG laser system with optical parametric oscillator, two detectors.

Instrument type

Homemade

Complexity level

High

Applications

As a pump-probe technique, it is used to record kinetic and spectral information about long-lived excited states. Temporal resolution is limited to 10 ns while the excitation and detection spectral range extends from 250 to 900 nm.