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Particulars

Esr

Nmr

Observed region

Microwave region

Radio frequency region

Energy required to bring about a transition

High

Low

Line width

1 gauss

0.1 gauss

Signals measured as

Derivative signal

Wider line

In ESR a lower magnetic field homogeneous to 1 in 105 over the sample is used. Where as NMR a figure of 1 in 108 is satisfactory

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