Author/Authors :
Y. Tokunaga ، نويسنده , , R.E. Walstedt، نويسنده , , Y. Homma، نويسنده , , D. Aoki، نويسنده , , S. Kambe، نويسنده , , H. Sakai، نويسنده , , T. Fujimoto، نويسنده , , S. Ikeda، نويسنده , , E. Yamamoto، نويسنده , , A. Nakamura، نويسنده , , Y. Shiokawa، نويسنده , , H. Yasuoka، نويسنده ,
Abstract :
We have performed 17O NMR spin–lattice relaxation measurements with conventional NMR techniques on 17O in NpO2NpO2. The results have been found to exhibit a field-dependent cross-relaxation effect from 237Np in addition to the field-independent exchange-fluctuation background rate which dominates at high fields. Analysis of the cross-relaxation process reveals a temperature-independent relaxation rate as well as a greatly enhanced unlike spin–spin coupling between the 237Np spins and their 17O nearest neighbors. We discuss the possibility of observing the cross-relaxation effects in other actinide dioxides.
