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Gaussian Shape

DESCRIPTION
The Gaussian shape has been largely used as a selective excitation, selective inversion and selective refocusing element in many NMR experiments.
REQUIREMENTS
The Gaussian shape can be defined in the SHAPE tool.
VERSIONS
The gaussian shape was proposed in 84JMR442-58 as an improved alternative to low-power rf pulses having a rectangular time-domain profile. Several examples of selective 1D experiments using gaussian pulses was reported ( 86JMR106-70 ).

However, the frequency-domain amplitude response of a gaussian 90 pulse is another gaussian and the undesired phase properties showing such pulse can be avoided by using a self-refocusing 270 gaussian pulse ( 89JMR211-82 ) or incorporating the 90 gaussian pulse into an spin-echo period ( 87JMR386-74 , 88JMR178-78 , 91JMR102-91 , 93MRC259 ).

For instance, the application of 270 gaussian pulse in selective 2D COSY  ( 90ANG517 and 92ANG1248 ), selective 2D NOESY ( 90JCP7698 ), selective 2D Triple-Quantum ( 94CPL291 ), selective 1D TOCSY ( 92ANG1248 ) experiments have been proposed.

EXPERIMENTAL DETAILS
More details in Tutorial: Defining a Gauss Shape.
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