Deuterium NMR is NMR spectroscopy of deuterium, an isotope of hydrogen. Deuterium is an isotope with spin = 1, unlike hydrogen-1, which has spin = 1/2. The term deuteron NMR, in direct analogy to proton NMR, is also used. From Wikipedia
Static deuterium NMR in 1.6‑nm pores revealed frozen layers coexisting with liquid‑like molecular rotation.
