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  • SPACE RADIATION  (435)
  • Life and Medical Sciences
  • 1970-1974  (692)
  • 1940-1944
  • 1920-1924
  • 1973  (692)
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  • 1970-1974  (692)
  • 1940-1944
  • 1920-1924
Year
  • 1
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    Biocore experiment (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The Apollo 17 biological cosmic ray experiment to determine the effect of heavy cosmic ray particles on the brain and eyes is reported. The pocket mouse was selected as the biological specimen for the experiment. The radiation monitors, animal autopsy and animal processing are described, and the radiation effects on the scalp, retina, and viscera are analyzed.
    Keywords: SPACE RADIATION
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 14 p
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  • 2
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    Ultraviolet spectrometer experiment (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The ultraviolet spectrometer (UVS) onboard the Apollo 17 orbiting spacecraft was used to measure emissions from the lunar atmosphere. The UVS and calibration are discussed along with the lunar atmosphere observations and lunar albedo measurements.
    Keywords: SPACE RADIATION
    Type: NASA. Johnson Space Center Apollo 17 Prelimin. Sci. Rept.; 10 p
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  • 3
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    The nature of interplanetary heavy ions with 0.1 less than E less than 40 MeV/nucleon (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: The populations of interplanetary particles were studied by examining the energy spectra in a cosmic ray detector placed in the shade, facing away from the sun. Suprathermal ions of solar origin, and low-energy galactic cosmic rays are discussed.
    Keywords: SPACE RADIATION
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 5 p
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  • 4
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    Quiet time energy spectra of heavy nuclei from 20 to 400 keV/amu (1973)
    In:  CASI
    Details
    Publication Date: 2006-01-11
    Description: Glass track detectors were exposed to cosmic rays on the moon from December 11 to 13, 1972, during a period of relatively quiet sun activity as inferred from satellite proton counters. From 80 to 400 keV/amu, the differential flux of heavy cosmic ray nuclei decreases roughly as E to the -2nd power; this result together with the greater flux from the solar than the antisolar direction identify these nuclei as solar in origin.
    Keywords: SPACE RADIATION
    Type: NASA. Johnson Space Center Apollo 17 Prelim. Sci. Rept.; 4 p
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  • 5
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    Theory of microwave and X-ray emission (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-05
    Description: The behaviour of the nonthermal electrons created at the impulsive phase of flares has been deduced from the microwave impulsive bursts and hard X-ray burst by many researchers. There is almost no doubt of the emission mechanisms that radio emissions are due to gyrosynchrotron emission and hard X-rays are collisional bremsstrahlung. However, there remain three controversial problems. One is whether the emission sources of the microwave impulsive burst and hard X-ray burst are common or not. Another is whether the injection of the nonthermal electrons into the source is impulsive or continuous. The other is the relation among the nonthermal electrons, soft X-rays, EUV flash, H-alpha kernels, and white light flares. These three problems are not independent of each other.
    Keywords: SPACE RADIATION
    Type: NASA, Washington High Energy Phenomena on the Sun; p 179-187
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  • 6
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    Energetic particles as a source of flare energy (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-05
    Description: The production of solar flares by the reservoir of energy generated by sunspot magnetic fields is discussed. Electrons play an important part in the flare process since high energy electrons are responsible for X-ray and radio emission. The energy required in the form of protons trapped in sunspot magnetic fields to produce large solar flares is analyzed. A trigger mechanism is described where the particles can be rapidly dumped into the chromosphere when fast electrons are produced by Coulomb collisions and through pion production by the highest energy protons.
    Keywords: SPACE RADIATION
    Type: NASA, Washington High Energy Phenomena on the Sun; p 12-18
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  • 7
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    High Energy Phenomena on the Sun Symposium - summary and outlook (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-05
    Description: A brief summary of the symposium is presented along with an outlook for developments in solar physics.
    Keywords: SPACE RADIATION
    Type: NASA, Washington High Energy Phenomena on the Sun; p 625-630
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  • 8
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    Regular pulsations from the solar corona (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-05
    Description: Meter-wave pulsations observed at Culgoora are discussed. The characteristics of recorded pulsation events are summarized.
    Keywords: SPACE RADIATION
    Type: NASA, Washington High Energy Phenomena on the Sun; p 589-593
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  • 9
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    Modulation of solar cosmic rays (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-05
    Description: Consideration is given to whether the modulation of low energy solar cosmic ray nuclei between the sun and earth can be so extreme that the fluxes observed at 1 AU imply (1) that the cosmic ray energy density in the solar atmosphere is comparable to the thermal energy density, and/or (2) that the cosmic ray intensity is sufficient in the solar atmosphere to produce detectable fluxes of secondary particles such as low energy positrons. It was found that such large modulation is compatible with observations, provided that the modulation occurrence is confined within a solar envelope lying within approximately 0.2 to 0.3 AU of the sun. There is, however, no compelling observational evidence to require that the modulation is this large.
    Keywords: SPACE RADIATION
    Type: High Energy Phenomena on the Sun; p 418-438
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  • 10
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    Decay time of type 3 solar bursts (1973)
    In:  CASI
    Details
    Publication Date: 2006-04-05
    Description: Type 3 solar bursts observed by OGO-5, below 600 kHz, were analyzed. Decay times were measured, and collisional decay times were computed for distances out to 1 AU. By fitting power functions to the computed and observed decay times, and using local plasma hypothesis, it was found that the ratio rho of computed observed values varies with heliocentric radial distance according to a power function rho = 3r to the 0.7th power, assuming fundamental emission, and rho = 2r to the 0.7th power, assuming second harmonic emission.
    Keywords: SPACE RADIATION
    Type: NASA, Washington High Energy Phenomena on the Sun; p 537-539
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