Isotope effect on hydrogen site energies for two metal dihydrides

Conference · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5472848

Venturini, E L

The change in hydrogen site energy with isotope for dihydrides and dideuterides of Sc and Y has been indirectly determined using electron spin resonance (ESR) of dilute Er ions in these face-centered-cubic hosts. The ESR spectra measure the distribution of hydrogen adjacent to the Er, and the variation in this distribution with isotope and with hydrogen to metal ratio has been studied for several samples of both host metals. These data are accurately described by a lattice-gas model which yields the energy difference for protons or deuterons on octahedral and tetrahedral sites, both adjacent to the Er impurities and in the bulk host lattice. This energy difference is 10% greater for deuterons, and the change with isotope can be attributed primarily to the mass dependence of the vibrational part of the total energy associated with each site.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 5472848
• Report Number(s): SAND-9-1541C; CONF-800402-1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
CRYOGENIC FLUIDS
DEUTERIUM
DISTRIBUTION
ELECTRON SPIN RESONANCE
ELEMENTS
FLUIDS
HYDROGEN
HYDROGEN ADDITIONS
HYDROGEN ISOTOPES
ISOTOPE EFFECTS
ISOTOPES
LATTICE PARAMETERS
LIGHT NUCLEI
MAGNETIC RESONANCE
METALS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
RESONANCE
SCANDIUM
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
YTTRIUM