Overview of the development of high-resolution NMR in NIMS

We have developed a NMR system and performed the proton NMR measurement of ethylbenzene and water using the superconducting magnet operating at ( for proton), which is the highest field produced by a superconducting NMR magnet in the persistent mode. From the NMR measurements, it is verified that both homogeneity and stability of the magnet have a specification sufficient for a high-resolution NMR. The sensitivity has been examined by NMR of 0.1% ethylbenzene in Wilmad 555 tube and obtained the signal-to-noise ratio as S/N=2981, which is the highest record, to our knowledge, among the room temperature measurements.