Statistics – Applications
Scientific paper
Feb 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.271..531b&link_type=abstract
Nature, Volume 271, Issue 5645, pp. 531-533 (1978).
Statistics
Applications
7
Scientific paper
THE first generation of fusion reactors will utilise the reaction between deuterium and tritium nuclei. Various metal tritides, therefore, have potential applications for the transport, storage, purification, isotope enrichment and gettering of tritium. Although many properties of the metal tritides can be estimated1 from the corresponding hydrides and deuterides, the effects of the radioactive triton decay into a β-particle and 3He atom with a half life of 12.3 yr can only be determined by direct observation. Considering the expected2 insolubility of inert 3He atoms in metal lattices, it is surprising that many metal tritides1,3,4 contain 3He/T atom ratios in excess of 0.10. The physical state of the retained 3He in these tritides is a very interesting and unresolved problem. Weaver and Camp5,6 suggest the 3He atoms are trapped in the octahedral interstitial sites for tritides with fluorite crystal structures while Bowman, et al.1 believe the 3He atoms primarily reside in microscopic gas bubbles with dimensions < 1,000Å. Here we describe nuclear magnetic resonance (NMR) studies of the relaxation times for 3He nuclei in LiT, TiT1.9, and UT3, which are representative of ionic, transition metal, and actinide tritides. These NMR measurements support the 3He bubble concept and further indicate an increase in the mean bubble dimensions as the samples age.
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