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  • DOCUMENTATION AND INFORMATION SCIENCE  (2)
  • 1990-1994  (2)
  • 1960-1964
  • 1
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    Collection, analysis, and archival of LDEF activation data (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-01-25
    Description: Samples intentionally placed aboard the LDEF and samples obtained from the LDEF structure were studied at NASA Marshall and seven national labs to determine the radioactivity produced in orbit. The gamma ray spectra from these studies have provided information concerning the type and quantity of radioactive nuclei produced by various activating particles. The gamma ray spectra, the resulting activation, and the experimental arrangements are being collected at Marshall and Eastern Kentucky Univ. for review, further analysis, and future archival. An overview of this process and the type of information that will be available for future reference is given. This information includes the samples studied, the location of the samples on LDEF, the amount and type of covering material, the types of detector systems, the format of the gamma ray spectra, and the corrections for geometry, self-absorption, detector efficiency, and background needed to obtain accurate specific activations (activation per kilogram) of material. Plans are given as to the archival of the data for such future reference and how other scientific investigators or spacecraft designers can access the data.
    Keywords: DOCUMENTATION AND INFORMATION SCIENCE
    Type: NASA. Langley Research Center, Second LDEF Post-Retrieval Symposium Abstracts; p 13
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Collection, analysis, and archival of LDEF activation data (1993)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The study of the induced radioactivity of samples intentionally placed aboard the Long Duration Exposure Facility (LDEF) and samples obtained from the LDEF structure is reviewed. The eight laboratories involved in the gamma-ray counting are listed and the scientists and the associated counting facilities are described. Presently, most of the gamma-ray counting has been completed and the spectra are being analyzed and corrected for efficiency and self absorption. The acquired spectra are being collected at Eastern Kentucky University for future reference. The results of these analyses are being compiled and reviewed for possible inconsistencies as well as for comparison with model calculations. These model calculations are being revised to include the changes in trapped-proton flux caused by the onset of the period of maximum solar activity and the rapidly decreasing spacecraft orbit. Tentative plans are given for the storage of the approximately 1000 gamma-ray spectra acquired in this study and the related experimental data.
    Keywords: DOCUMENTATION AND INFORMATION SCIENCE
    Type: NASA. Langley Research Center, LDEF: 69 Months in Space. Part 1: Second Post-Retrieval Symposium; p 111-124
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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