Np237 - O17 cross relaxation in NpO2 driven by indirect spin-spin coupling

Y. Tokunaga, R. E. Walstedt, Yoshiya Homma, Dai Aoki, S. Kambe, H. Sakai, T. Fujimoto, S. Ikeda, E. Yamamoto, A. Nakamura, Y. Shiokawa, H. Yasuoka

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Abstract

A comprehensive study of O17 nuclear spin-lattice relaxation in NpO2 is reported for a wide range of fields and temperatures. In both the paramagnetic and ordered-state regions, a strong, field-dependent cross-relaxation process is observed in addition to the expected background rate. The cross-relaxation process, driven by the Np237 spins, is conveyed to the O17 via a greatly enhanced indirect nuclear spin-spin coupling. The magnitude and temperature dependence of the indirect coupling are in reasonable accord with a simple theoretical model. The magnitude and temperature dependence of the Np237 T1 process are also deduced from the data obtained.

Original languageEnglish
Article number064421
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number6
DOIs
Publication statusPublished - 2006 Sep 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Tokunaga, Y., Walstedt, R. E., Homma, Y., Aoki, D., Kambe, S., Sakai, H., Fujimoto, T., Ikeda, S., Yamamoto, E., Nakamura, A., Shiokawa, Y., & Yasuoka, H. (2006). Np237 - O17 cross relaxation in NpO2 driven by indirect spin-spin coupling. Physical Review B - Condensed Matter and Materials Physics, 74(6), [064421]. https://doi.org/10.1103/PhysRevB.74.064421