In an experiment to determine the pulse length, an operator observed a positive signal for pulse widths of 5 and 10 s as the pulse was lengthened further the intensity decreased going through a null at 20 5 s and then becomes negative Explain what is happening in this experiment and use the data to determine the RF field strength in Hz and in rad s 1, and the length of a 90 pulse A further null in the signal was seen at 41 0 s to what do you attribute this

Question: In an experiment to determine the pulse length, an operator observed a positive signal for pulse widths of 5 and 10 s; as the pulse

In an experiment to determine the pulse length, an operator observed a positive signal for pulse widths of 5 and 10 μs; as the pulse was lengthened further the intensity decreased going through a null at 20.5 μs and then becomes negative.
Explain what is happening in this experiment and use the data to determine the RF field strength in Hz and in rad s-1, and the length of a 90° pulse.
A further null in the signal was seen at 41.0 μs; to what do you attribute this?

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