NMR Studies of Actinide Compounds: The NMR of Actinide Nuclei

Autor:	Harukazu Kato, Shinsaku Kambe, Hironori Sakai, Hiroshi Yasuoka, T. Fujimoto, Yo Tokunaga, R. E. Walstedt
Rok vydání:	2006
Předmět:	Deuterium NMR Materials science Spins Relaxation (NMR) General Physics and Astronomy Fluorine-19 NMR Actinide Paramagnetism symbols.namesake Pauli exclusion principle Nuclear magnetic resonance Relaxation rate symbols Physical chemistry
Zdroj:	Journal of the Physical Society of Japan. 75:77-81
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsjs.75s.77
Popis:	In a brief recap of recent work on actinide NMR studies at JAERI, we review the direct observation of 235 U NMR which has been carried out for both UO 2 and USb 2 , as well as the estimate of T 1 ( T ) for 235 U which has been obtained from indirect (i.e., T 2 of 103 Rh) NMR studies of the Pauli paramagnet URh 3 . New data for 1/ T 1 vs T for 17 O in NpO 2 are presented and analyzed. A sizeable fraction of the observed relaxation rate is strongly field-dependent, an effect attributed to a cross-relaxation process from the 100%-abundant, I = 5/2 237 Np nuclear spins. Analysis of this relaxation component leads to quantitative estimates of T 1Np (≃40 ns) and of anomalously enhanced values of the 17 O– 237 Np nuclear spin-spin coupling. These effects as well as future prospects for actinide NMR studies are discussed.
Databáze:	OpenAIRE
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