First, did not see any signal around 19.8 MHz where it was earlier (at 1708 on Mar 4). Did see a really small and noisy signal at 20.2 MHz. Went to lower frequencies, and found a better signal at 18.05 MHz. It still was small and very noisy. Did EPR at this resonance; got a polarization of 32.6%. Then hit the wrong button by mistake and flipped the spins again; got a polarization of 29.95%.
Did NMR at 0346, x/up = -79.71 mV; x/dn = -79.05 mV. (∼35.1% with earlier calib. const.)
So the NMR indicates a higher polarization than before, but the EPR shows the opposite. There will be some time before the polarization losses in the pumping chamber drift to the target chamber to be noticed by NMR. This measurement does not work as a good calibration. Shall do another calibration at ~0730.
The B field again seems to be around 23.12G as seen by EPR. And this time
there was no NMR done before EPR!
A copy of this log entry has been emailed to: korsch@pa.uky.edu,cates@uva.edu