Yes. this is what I did in nmrview. calculated decay rates based on intensity. the values obtained using the nmrview interface gives rise to R1. Seth > Hello all, > > I've set up a series with 8 condition points (8 T1 points) and a fitting > function to A exp(-Bx). I am using my first experiment (first T1 point) > as the reference peak list (not my assigned HSQC) as I'm just wanting to > test things out at first. > I have grouped peaks from all eight spectra. > Subsequently I have only been able to fit the data to the A exp(-Bx) > function and calculate T1 rates using height as the intensity type (and > not volume). > Is this normal? > > Henry Hocking >