Examination of the data obtained by gamma-ray spectrometers on the Apollo 15 and Apollo 16 spacecraft has been carried out in part by summing up broad regions of the energy spectrum. The most instructive of these energy regions is 0.55 to 2.75 MeV, where the difference in count rates observed can be accounted for mainly by variations in the Th, U, and K content of the surface layers. The highest values are found in Mare Imbrium and Oceanus Procellarum, where a good deal of local variation is observed. By contrast, little increase is seen in the eastern maria surveyed compared with count rates in highland areas. The broad highland regions are low in radioactivity, but there is a measurable rise near the southernmost latitude on the far side. In addition to the radioactive lines, gamma-ray lines which can be ascribed to O, Si, Fe, Mg, and Al have been identified.


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    Titel :

    Lunar orbital gamma ray measurements from Apollo 15 and Apollo 16.


    Beteiligte:
    Arnold, J. R. (Autor:in) / Peterson, L. E. (Autor:in) / Reedy, R. C. (Autor:in) / Trombka, J. I. (Autor:in) / Metzger, A. E. (Autor:in)

    Kongress:

    Plenary Meeting on Space research XIII ; 1972 ; Madrid, Spain


    Erscheinungsdatum :

    01.01.1973


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Lunar Composition from APOLLO Orbital Measurements

    I. Adler / J. I. Trombka / L. I. Yin et al. | NTIS | 1972


    Lunar composition from Apollo orbital measurements

    Adler, I. / Trombka, J. I. / Yin, L. I. et al. | NTRS | 1972


    Lunar composition from Apollo orbital measurements.

    Adler, I. / Trombka, J. I. | NTRS | 1973


    Apollo lunar orbital science.

    Roberson, F. I. / Esenwein, G. F. | NTRS | 1972