Results of the Apollo 15 and 16 X-ray experimentExcept for some minor modifications the Apollo 16 X-ray fluorescence experiment was similar to that flown aboard Apollo 15. The Apollo 16 provided data for a number of features not previously covered such as Mare Cognitum, Mare Nubium, Ptolemaeus, Descartes, Mendeleev, and other areas. Many data points were obtained by the X-ray experiments, so that comparisons could be drawn between Apollo 15 and 16 flights. The agreement was generally within about 10%. Al/Si concentration ratios ranged from 0.38% in Mare Cognitum to 0.67% in the Descartes area highlands. A comparison of the Apollo 16 data Al/Si values with optical albedo values along the ground tracks showed the same positive correlation as in the Apollo 15 flight. A reexamination of the detector and collimator geometries showed that the spatial resolution was better by almost a factor of two than the initial estimates.
Document ID
19740040247
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Adler, I.
Trombka, J. I.
Schmadebeck, R.
Lowman, P.
Blodget, H.
Yin, L.
Eller, E. (NASA Goddard Space Flight Center Greenbelt, Md., United States)
Podwysocki, M.
Weidner, J. R.
Bickel, A. L. (Maryland, University College Park, Md., United States)