TY - JOUR
T1 - Np237 - O17 cross relaxation in NpO2 driven by indirect spin-spin coupling
AU - Tokunaga, Y.
AU - Walstedt, R. E.
AU - Homma, Y.
AU - Aoki, D.
AU - Kambe, S.
AU - Sakai, H.
AU - Fujimoto, T.
AU - Ikeda, S.
AU - Yamamoto, E.
AU - Nakamura, A.
AU - Shiokawa, Y.
AU - Yasuoka, H.
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.74.064421
DO - 10.1103/PhysRevB.74.064421
M3 - Article
AN - SCOPUS:33747892865
SN - 1098-0121
VL - 74
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 6
M1 - 064421
ER -