In the past H.T. Weaver has collaborated on articles with A.R. DuCharme and R.D. Nasby. One of their most recent publications is Nuclear relaxation rates for 3He adsorbed on zeolite☆. Which was published in journal Journal of Physics and Chemistry of Solids.

More information about H.T. Weaver research including statistics on their citations can be found on their Copernicus Academic profile page.

H.T. Weaver's Articles: (6)

Nuclear relaxation rates for 3He adsorbed on zeolite☆

AbstractTransient nuclear magnetic resonance measurements of spin-lattice and spin-spin relaxation times have been carried out as a function of temperature and pressure on 3He adsorbed on two types of commercial zeolite. In addition, the number of atoms adsorbed on unit weights of zeolite was determined by spin counting. Mechanisms for spin-spin relaxation were provided by dipole interactions among helium spins and spin-lattice relaxation was probably due to atomic motion.

A pseudopotential theory for self-diffusion in cubic metals☆

AbstractA simple model for vacancy self-diffusion in metals is used to formulate the migration energy in terms of pseudopotential theory. Applications are made to Al, Li, Na, and K using local pseudopotentials. The results are in especially close agreement with experiment for Al, where the vacancy diffusion mechanism is known to occur.

Nuclear resonance and susceptibility studies on PtSi☆

AbstractNuclear magnetic resonance measurements of the spin-lattice relaxation time and Knight shift in the temperature range 1–4K have been made for 195Pt and 29Si contained in PtSi. Bulk susceptibilities were measured for temperatures from 4 to 300K. Analysis of these data shows the conduction electrons to be mainly of s-electron character with evidence that the conduction band is formed from silicon states.

Nuclear resonance study of lithium motion in β-eucryptite (LiAlSiO4)☆

AbstractSeveral diffusion processes have been observed in ceramic β-eucryptite using NMR methods. One low activation energy (0.25 eV) process has been identified with the high temperature disordered phase of the lattice. NMR deduced jump rates agree well with Raman scattering experiments.

Nuclear magnetic resonance determination of the isotope effect in titanium tritide☆

AbstractNuclear magnetic resonance methods have been used to observe an isotope effect for hydrogen diffusion in TiH1.5. The observed mass dependence of the atomic jump frequency and activation energy is consistent with the analysis of LaClaire.

High efficiency p+-n-n+ silicon concentrator solar cells

AbstractEfficiencies equalling 20% were measured for solar concentrations from 20 to 100 suns on planar p+-n-n+ silicon concentrator cells. These cells were fabricated on 0.3 Ω cm n-type (100) float zone silicon wafers which were 300 μm thick. To attain a high efficiency in these cells, phosphorus gettering was employed to maintain long minority carrier lifetime in the base, and a thermal oxide was grown on the front surface to reduce the surface recombination velocity. Minority carrier lifetimes of 50 – 100 μs were measured on these cells with a new measurement technique involving pulsing the cell with an IR source and measuring the decay of both the short-circuit current and the open-circuit voltage. Spectral quantum efficiency data also indicate long base lifetimes and effective front-surface passivation.

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