Calculate the effective FID signal from a sample with a constant spin density function under the following condition: a. The magnetic field inhomogeneity has the following Gaussian distribution:
(1)/(\sqrt(2\pi B_(0)^(2)))exp[-((B-B_(0))^(2))/(2B_(0)^(2))]b. The magnetic field is described by
B(x)=B_(0)xrect(x), where
rect(x)={(0,x<-(1)/(2)),(1,-(1)/(2)<=x<=(1)/(2)),(0,x>(1)/(2)):}