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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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Thermal conductivity of powders in vacuum from 120 to 350 degrees k, measured by an apparatus enclosed in a sand-cast aluminum vacuum chamber
F and K corona observations by rocket coronagraph during solar eclipse
X-ray analyses on K-band spectral structure for titanium absorption in nitrides and carbides
Relativistic photoelectric cross section for two electrons of K-shell computed, using numerical program
Vegetation mapping from K-band radar imagery using image discrimination, enhancement, combination and sampling system
Spectral analysis of K alpha type X-ray transitions in solar atmosphere and laboratory plasma
Users manual for ODD-K computer program used in radiation shielding design and analysis in nuclear rocket systems
ODD-K angular flux tape computer program for radiation shielding design and analysis in nuclear rocket systems
Vapor pressure measurements of potassium to 2170 deg K
Beryllium 7 K-capture effect on solar neutrino flux, noting calculated solar neutrino emission decrease from Be bound electron capture
Two dimensional electronically scanned k-band phased array antenna design and performance, discussing radiometric system
Velocity and angular distributions of KBr formed in reactive collisions between crossed molecular beams of K and thermal HBr/DBr/
Free radicals destruction rates by gamma irradiation at 77 K measured as first order function of dosage, using electron spin resonance spectroscopy
Reflected shock air plasma thermodynamic properties at 12,000 to 16,000 deg K
Phonon excitations radiated from thermal source in He II below 0.3 K, using carbon film detectors
Super metal rich K giant stars atmospheric model, obtaining abundances and turbulent velocity parameter
K-LL Auger spectra of nitrogen, oxygen, carbon monoxide, nitrogen oxide, water and carbon dioxide, using double focusing electrostatic electron spectrometer
The lunar breccia 14318 is one of three Apollo-14 breccias containing substantial amounts of parentless xenon from the spontaneous fission of extinct Pu-244. The argon and xenon contained in this breccia were studied by stepwise heating of pristine and neutron-irradiated samples. The isotopic composition of xenon from fission, determined by an improved method, is shown to be from Pu-244. Concentrations of this fissiogenic xenon are in substantial excess (15-fold) of what could be produced by spontaneous fission of U-238. The breccia is found to contain abundant trapped argon with an Ar-40/Ar-36 ratio of roughly 14. Otherwise, the argon is radiogenic and gives a convincing K-Ar age of 3.69 plus or minus 0.09 b.y. by the stepwise Ar-40/Ar-39 method, nearly in agreement with ages for other Apollo-14 breccias.