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  • INSTRUMENTATION AND PHOTOGRAPHY  (4)
  • PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR  (4)
  • 1
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    Are fission tracks in meteorites from super heavy elements? (1969)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Evidence of superheavy elements as source of fission tracks in meteorites
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: RADIATION EFFECTS 11 SEP. 1969 (SEE N70-11065 01-13)
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Nuclear particle track identification in inorganic solids (1969)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Nuclear particle track identification in inorganic dielectric glasses
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: RADIATION EFFECTS 11 SEP. 1969 (SEE N70-11065 01-13)
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Iron meteorites - X-ray asterisms are not necessarily shock effects (1969)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: X ray diffraction patterns, like patterns from kamacite in iron meteorites, formed by static deformation at low stresses
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: RADIATION EFFECTS 11 SEP. 1969 (SEE N70-11065 01-13)
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Energy straggling eliminated as a limitation to charge resolution of transmission detectors (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: It is pointed out that detectors of the energy loss of penetrating charged particles are widely used for particle identification. These measurements are hampered, however, by fluctuations in the amount of energy deposited within the detector. It is shown that this limitation can be overcome with a new nuclear track detector, CR-39(DOP), and that the charge resolution of this detector exceeds that of any other, including semiconductor diodes.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Nature; 293; Oct. 15
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Composition and energy spectra of solar particles (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Modern and ancient energetic particles emitted in solar flares are examined. Data cover particle composition and energy spectra.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: NASA, Washington High Energy Phenomena on the Sun; p 377-392
    Format: text
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  • 6
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    Sonic spark chambers for cosmic-ray experiments (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The sonic spark chamber provides an attractive high resolution hodoscope for low flux cosmic ray experiments. Spark position is determined by measurement of the time of flight of the sonic shock front from the spark position to a number of piezoelectric transducers placed at the periphery of the chamber. For each spark, four quantities must be determined: the spark coordinates, the sound velocity, and the spark 'size'. By over-determining the four parameters, high accuracy is possible. With eight sonic transducers, air-gap spark positions were measured with an error of less than 100 microns everywhere over a 1 sq m region.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: International Cosmic Ray Conference; Aug 15, 1975 - Aug 29, 1975; Munich
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  • 7
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    High resolution image measurements of nuclear tracks (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The striking clarity and high contrast of the mouths of tracks etched in CR-39 plastic detectors allow automatic measurement of track parameters to be made with simple image-recognition equipment. Using a commercially available Vidicon camera system with a microprocessor-controlled digitizer, resolution for normally incident C-12 and N-14 ions at 32 MeV/amu equivalent to a 14sigma separation of adjacent charges was demonstrated.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: International Cosmic Ray Conference; Aug 06, 1979 - Aug 18, 1979; Kyoto; Japan
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  • 8
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    Research on CR-39 plastic detectors for cosmic ray astrophysics (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The sensitivity of CR-39 is a strong function of catalyst concentration during its polymerization. Normal CR-39 will detect vertically incident particles with Z/beta as low as 10. An extrapolation suggests that CR-39 with a high catalyst concentration and sensitivity to within approximate 5% can be made by a suitable choice of cure cycle and mold material. CR-39 is less sensitive than Lexan to thermal annealing of tracks but cannot tolerate background radiation levels greater than a few Mrad.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: International Cosmic Ray Conference; Aug 06, 1979 - Aug 18, 1979; Kyoto; Japan
    Format: text
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