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Results for “cosmic ray”

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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At least 109 records · Page 6
All sourcesNASA NTRSDOE OSTI
NASA NTRS1971

Solar cosmic rays

Solar cosmic ray data, discussing multicharged nuclei relative abundances in photosphere and propagation models

Fichtel, C. E.↗
NASA NTRS1978

Cosmic electrons, galactic radio background and cosmic ray confinement

Cosmic ray electron measurements and radio background data are analyzed to obtain bounds on the galactic magnetic fields. It is shown that the magnetic field required to explain the radio flux must be greater than 2 micro Gauss. The difference in the steepening of the radio spectra towards the Anticenter and the Halo Minimum provides evidence that the magnetic field decreases with the height above the galactic plane. The calculations of Bulanov and Dogiel (1975) are applied to the radio and electron observations. It is shown that the most plausible interpretation of these results requires that the electron injection spectrum has an intrinsic flattening below a few GeV. The observed steepening of radio and electron data is apparently a combined effect of the injection spectrum and the first break due to continuous energy loss of electrons in space.

Badhwar, G. D.↗
NASA NTRS1983

Detectors of ultraheavy cosmic rays

Ultraheavy cosmic rays have been measured by both passive and electronic detectors. These detectors are reviewed, and the requirements are given for the next major step in detector design.

Israel, M. H.↗
NASA NTRS2000

Cosmic Ray Astronomy

The cosmic ray division participation in the cooperative agreement was activated in the second year. The scientific goals will be analysis of cosmic ray data from the Japanese-American Cooperative Emulsion Experiments (JACEE). Measurements of primary cosmic rays in the JACEE emulsion chambers will be made to derive for each detected particle the deposited energy in the chamber and the primary charge (atomic number). The data will be corrected to the primary flux above the atmosphere, and the composition and energy spectra will be derived. The spectra of the individual elements will be interpreted in context with the supernova shock and other models of cosmic ray acceleration. Additional information is contained in the original extended abstract.

Wu, S. T.↗
NASA NTRS1985

The galactic gamma-ray distribution and the radial cosmic ray gradient

The radial distribution is derived of gamma ray emissivity and the cosmic ray intensity in the Galaxy using the final SAS-2 results, the recently corrected COS-B results, and recent CO surveys of the Northern and Southern Galactic Hemispheres. In addition to the 5 kpc ring of enhanced emission, there is evidence for spiral features. A strong increase in the cosmic ray flux is found in the inner Galaxy, particularly in the 5 kpc region, in both halves of the plane.

Harding, A. K.↗
NASA NTRS1985

Gamma ray line production from cosmic ray spallation reactions

The gamma ray line intensities due to cosmic ray spallation reactions in clouds, the galactic disk and accreting binary pulsars are calculated. With the most favorable plausible assumptions, only a few lines may be detectable to the level of 0.0000001 per sq. cm per sec. The intensities are compared with those generated in nuclear excitation reactions.

Silberberg, R.↗