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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Background gamma ray observations attributed to decay of pi-mesons produced by extragalactic cosmic ray protons collisions, noting radiation sources age
Apollo 11 lunar rocks, breccias and fines age and chemistry, major element, trace element and rare earth abundances, texture, crystallization and meteoritic effects
Apollo 11 lunar material isotopic age determination, discussing rock crystallization, radiogenic dust, lead isotope data and moon origin
Apollo 11 lunar rock Rb-Sr isotopic age relationships, discussing magmatic fractionation of Rb relative to Sr in moon primordial material
Lunar surface material age and post- crystallization from isotopic investigation of Apollo 11 samples of U-Th-Pb systematics
Age determination of Apollo 11 samples from isotopic composition measurements by isotope dilution techniques, comparing to terrestrial and meteoritic values
Crystalline rocks from Mare Tranquillitatis and Oceanus Procellarum, determining K-Ar ages
Absolute scale for radiation ages of stony meteorites
Using thin-foil electron microscopy to study effects of cold working and aging on substructure and precipitation in cobalt-base alloy L-605
Compact analytic solution to distribution theory of nonsteady state model illustrated with biological data - age dependency in compartmental analysis
Apollo 12 lunar rock 12013 origin, determining age by U, Th and Pb isotopic study
Mn 53 age measurement of galactic cosmic rays
Age and composition effects on lunar surface processes and optical properties, explaining main albedo, maria, color contrasts and temporal changes
Aubrite radiation age dating for stony meteorites lifetimes as function of collisional destruction, using Ne 21/Al 26 methods
Cosmic ray spallation products and radiation age determination from spectral analysis of noble gas components in lunar rocks
Bimetallic refractory metal joints electron beam welding and aging for applications to in-pile thermionic converters
Quenched and aged Pt, investigating secondary defects for vacancies clustering modes by transmission electron and field-ion microscopy
Argon isotopes retention ages of crystalline lunar rocks 12002, 12051 and 12065 from lunar maria, using neutron activitation and stepwise heating experiments