17O NMR spin-lattice relaxation in NpO2: Field-dependent cross-relaxation process driven by 237Np spins

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

doi:10.1016/j.jpcs.2007.08.018

¹⁷O NMR spin-lattice relaxation in NpO₂: Field-dependent cross-relaxation process driven by ²³⁷Np spins

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

Materials Processing and Characterization Division

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We have performed ¹⁷O NMR spin-lattice relaxation measurements with conventional NMR techniques on ¹⁷O in NpO₂. 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.

Original language	English
Pages (from-to)	2016-2019
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	68
Issue number	11
DOIs	https://doi.org/10.1016/j.jpcs.2007.08.018
Publication status	Published - 2007 Nov

Keywords

A. Oxides
D. Magnetic properties
D. Nuclear magnetic resonance (NMR)

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/j.jpcs.2007.08.018

Cite this

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. (2007). ¹⁷O NMR spin-lattice relaxation in NpO₂: Field-dependent cross-relaxation process driven by ²³⁷Np spins. Journal of Physics and Chemistry of Solids, 68(11), 2016-2019. https://doi.org/10.1016/j.jpcs.2007.08.018

Tokunaga, Y, Walstedt, RE, Homma, Y , Aoki, D, Kambe, S, Sakai, H, Fujimoto, T, Ikeda, S, Yamamoto, E, Nakamura, A, Shiokawa, Y & Yasuoka, H 2007, '¹⁷O NMR spin-lattice relaxation in NpO₂: Field-dependent cross-relaxation process driven by ²³⁷Np spins', Journal of Physics and Chemistry of Solids, vol. 68, no. 11, pp. 2016-2019. https://doi.org/10.1016/j.jpcs.2007.08.018

@article{d148f33a0f0b4c82bb49ed0854b36033,

title = "17O NMR spin-lattice relaxation in NpO2: Field-dependent cross-relaxation process driven by 237Np spins",

abstract = "We have performed 17O NMR spin-lattice relaxation measurements with conventional NMR techniques on 17O in NpO2. 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.",

keywords = "A. Oxides, D. Magnetic properties, D. Nuclear magnetic resonance (NMR)",

author = "Y. Tokunaga and Walstedt, {R. E.} and Y. Homma and D. Aoki and S. Kambe and H. Sakai and T. Fujimoto and S. Ikeda and E. Yamamoto and A. Nakamura and Y. Shiokawa and H. Yasuoka",

note = "Funding Information: The authors would like to thank K. Kubo and T. Hotta for valuable discussions. This work was partly supported by the Ministry of Education, Culture, Sports and Science and Technology, Grants-in-Aid for Young Scientists (B) (18740215), 2006.",

year = "2007",

month = nov,

doi = "10.1016/j.jpcs.2007.08.018",

language = "English",

volume = "68",

pages = "2016--2019",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

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TY - JOUR

T1 - 17O NMR spin-lattice relaxation in NpO2

T2 - Field-dependent cross-relaxation process driven by 237Np spins

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.

N1 - Funding Information: The authors would like to thank K. Kubo and T. Hotta for valuable discussions. This work was partly supported by the Ministry of Education, Culture, Sports and Science and Technology, Grants-in-Aid for Young Scientists (B) (18740215), 2006.

PY - 2007/11

Y1 - 2007/11

N2 - We have performed 17O NMR spin-lattice relaxation measurements with conventional NMR techniques on 17O in NpO2. 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.

AB - We have performed 17O NMR spin-lattice relaxation measurements with conventional NMR techniques on 17O in NpO2. 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.

KW - A. Oxides

KW - D. Magnetic properties

KW - D. Nuclear magnetic resonance (NMR)

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SP - 2016

EP - 2019

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

IS - 11

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