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Effect of Helium on the Electronic Structure of Palladium Tritide

Published online by Cambridge University Press:  10 February 2011

R. P. Gupta  and
M. Gupta
R. P. Gupta
Affiliation:
Section de Recherches de Métallurgie Physique, Centre d'Etudes Nucléaires de Saclay, 91191 Gif-sur-Yvette, Cédex, France
M. Gupta
Affiliation:
Institut des Sciences des Matériaux, Bâtiment 415, Université Paris-Sud, 91405 Orsay, France
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Abstract

Tritium is usually stored in the form of a metal tritide since it is safe to handle in this form, easily recoverable, and further large quantities of tritium can be stored. However, since tritium is radioactive it decays into 3He and an electron. Helium recoil energy in this reaction is very small, and not enough to create defects. We have performed ab-initio electronic structure calculations that show that in PdT, a considerable amount of 3He can be accommodated at the 3He results in an overall enhancement in the strength of the metal- tritium bonding that leads to the lowering of the plateau pressure. We also find that there is a weakening of the metal-metal bonds due to the repulsive interaction with 3He.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 513: Symposium H – Hydrogen in Semiconductors and Metals , 1998 , 67
Copyright
Copyright © Materials Research Society 1998

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References

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