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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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Long-range behavior of effective one-body potential representing particle compound system interaction, using modified effective range theory to extrapolate cross section data to zero energy
Three turning points in effective potential-energy curve and effect on semiclassical scattering
High voltage breakdown in electrode discharge initiated by particle impact in hypothesis of Cranberg
Coupled equations solved for general category of nucleon-meson cascade - kernel functions for primary particle spectra
Hypervelocity impact ionization from fragile targets
Wave-particle interactions in solar wind
Solar wind interaction with earth magnetosphere
Projection operators applicable for rearrangement and exchange processes with full recoil effect for unified reaction theory of Feschbach
Theory and analysis of relative motion and internal excitation in molecular collisions
Self-consistent three-body calculation of pion- nucleon scattering using off-energy shell theory
Excited state and steady state populations in high pressure plasma with heavy particle collisional ionization and electron-ion recombination
Electric field in plasma half space determined using normal mode analysis with collisions and particle conserving model
Transition probabilities for collinear collision of particle with harmonic oscillator, noting reasons for discrepancy in Jackson and Mott form
Electric field in plasma half space determined by longitudinal wave normal mode analysis, using BKG particle conserving collision model
Impulsive solar flare X rays spectral characteristics, examining electron energy, bremsstrahlung, microwave bursts and particle escape, collisions and injection
Results obtained using a recently developed calculational method for determining the nucleon-meson cascade induced in thick materials by high-energy nucleons and charged pions are presented. The calculational method uses the intranuclear-cascade-evaporation model to treat nonelastic collisions by particles with energies approximately or smaller than GeV and an extrapolation model at higher energies. The following configurations are considered: (1) 19.2-GeV/c protons incident on iron; (2) 30.3-GeV/c protons incident on iron; (3) solar and galactic protons incident on the moon, and (4) galactic protons incident on tissue. For the first three configurations, experimental results are available and comparisons between the experimental and calculated results are given.
The testimony which the main features of the lunar surface bear on the cosmic environment in which the satellite acquired its principal morphological characteristics is examined. It is assumed as a working hypothesis that, in the earliest stages of the moon's history, the lunar sculpture in the continental areas was predominantly shaped by external impacts. It is considered that the argument against heliocentric orbits of particles whose collisions with the moon disfigured most of its continental areas continues to hold good. The distribution of craters due to oblique impacts appears to be essentially at random all over the lunar surface.
By application of Lyttleton's theory for the formation of comets, it is shown that a possible mechanism for the origin and formation of a concentration of cosmic particles around the earth and the other planets of the solar system exists. In the vicinity of the neutral point, where the velocity of colliding particles is not greater than 6 km/s, it is found that if the solid particles after collision must remain in a solid state, there can be no possibility of accretion for Mercury, Mars, and the Moon, where the maximum value of the distance of the center of the planet to the asymptotic trajectory is less than the radius of the planet. On the other hand, the capture radii of microparticles in solid form varies from a minimum of 2.95 planetary radii for Venus and 3.47 for the Earth, to about 986 for Jupiter.