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    <title>Overview of the Apollo 16 X-ray Fluorescence Spectrometer (XRFS)</title>
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      <author_list>Williams, D.R.</author_list>
      <editor_list>McLaughlin, S.A.</editor_list>
      <publication_year>2017</publication_year>
      <description>This document provides an overview of the Apollo 16 X-ray Fluorescence
      Spectrometer (XRFS) which was carried on board Command Service Module (CSM) on the Apollo 16
      mission.</description>
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  <Reference_List>
    <External_Reference>
      <doi>doi:10.1126/science.175.4020.436.</doi>
      <reference_text>Adler, I., J.I. Trombka, J. Gerard, P. Lowman, R. Schamadebeck, H. Blodgett,
      E. Eller, L. Yin, R. Lamothe, P. Gorenstein, and P. Bjorkholm, Apollo 15 Geochemical X-Ray
      Fluorescence Experiment: Preliminary Report, Science, Vol. 175, pp. 436-440,
      1972.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Adler, I., J. Gerard, J.I. Trombka, R. Schamadebeck, P. Lowman, H. Blodgett,
      L. Yin, E. Eller, and R. Lamothe, The Apollo 15 X-Ray Fluorescence Experiment, Proc. Lunar
      Sci Conf. 3rd, Vol 3, pp. 2157-2178, MIT Press, Cambridge, MA, 1972.</reference_text>
    </External_Reference>
    <External_Reference>
      <doi>doi:0.1126/science.177.4045.256</doi>
      <reference_text>Adler, I., J.I. Trombka, J. Gerard, P. Lowman, R. Schamadebeck, H. Blodgett,
      E. Eller, L. Yin, R. Lamothe, G. Osswald, P. Gorenstein, P. Bjorkholm, H. Gursky, and B.
      Harris, Apollo 16 Geochemical X-ray Fluorescence Experiment: Preliminary Report, Science,
      Vol. 177, pp. 256-259, 1972.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Adler, I., J.I., Trombka, R. Schmadebeck, P. Lowman, and B. Harris, Results
      of the Apollo 15 and 16 X-ray experiment, Proc. Lunar Sci Conf. 4th, Vol. 3, 2783-2792,
      Pergamon Press, New York, NY, 1973.</reference_text>
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    <External_Reference>
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      fluorescence experiment, Apollo 15 Preliminary Science Report, NASA SP-289, 17-1, published
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    </External_Reference>
    <External_Reference>
      <reference_text>Adler, I., J. Trombka, J. Gerard, P. Lowman, R. Schmadebeck, H. Blodget, E.
      Eller, L. Yin, R. Lamothe, G. Osswald, P. Gorenstein, P. Bjorkholm, H. Gursky, B. Harris, L.
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      to eliminate nongeochemical variation in X-ray fluorescence data, Proc. Lunar Sci. Conf. 9th,
      3, 3029-3036, 1978.</reference_text>
    </External_Reference>
    <External_Reference>
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      geochemistry in the Undarum/Spumans/Balmer region of the moon, Earth Moon and Planets, 38,
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      east of Smythii, Earth Moon and Planets, 53, 93-10, 1991.</reference_text>
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    <External_Reference>
      <reference_text>Clark, P.E., C.G. Andre, I. Adler, J. Weidner, and M. Podwysocki, Palus
      Somni: anomalies in the correlation of Al/Si X-ray fluorescence ratios and broad-spectrum
      albedo., Geophys. Res. Lett., 3, 421-424, 1976.</reference_text>
    </External_Reference>
    <External_Reference>
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      method applied to XRF Al/Si ratios and other lunar remote sensing data, Proc. Lunar Sci.
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    <External_Reference>
      <doi>doi:10.1086/157822</doi>
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      Distance and Spectrum of the Apollo Gamma-Ray Burst, Astrophysical Journal, 236, 951-957,
      1980.</reference_text>
    </External_Reference>
    <External_Reference>
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    </External_Reference>
    <External_Reference>
      <reference_text>Lauderdale, W., and W. Eichelman, Apollo Scientific Experiments Data
      Handbook, NASA Technical Memorandum X-58131, JSC-09166, Chapter 27 published by NASA Johnson
      Space Center, Houston, Texas, Aug. 1974 (revised Apr. 1976).</reference_text>
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    <External_Reference>
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      <reference_text>Metzger, A.E., R.H. Parker, D. Gilman, L.E. Peterson, and J.I. Trombka,
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      Spectrum, Astrophysical Journal, 194, L19-L25, 1974.</reference_text>
    </External_Reference>
    <External_Reference>
      <doi>doi:10.1086/181661</doi>
      <reference_text>Trombka, J.I., E.L, Eller. R.L. Schmadebeck, I. Adler, A.E. Metzger, D.
      Gilman, P. Gorenstein, and P. Bjorkholm, Observation of a Cosmic Gamma-Ray Burst on Apollo
      16, II - X-Ray Time Profile and Source Location, Astrophysical Journal, 194, L27-L33,
      1974.</reference_text>
    </External_Reference>
    <External_Reference>
      <reference_text>Trombka, J.I., J.R. Arnold, I. Adler, A.E. Metzger, and R.C. Reedy, Lunar
      elemental analysis obtained from the Apollo gamma-ray and x-ray remote sensing experiment,
      Proceedings of the Soviet-American Conference on the Cosmochemistry of the Moon and Planets,
      Moscow, Soviet Union, NASA TM X-72195, 1974.</reference_text>
    </External_Reference>
  </Reference_List>
  <Document>
    <acknowledgement_text>Document provided by the NASA Space Science Data Coordinated Archive
    (NSSDCA, formerly NSSDC)</acknowledgement_text>
    <publication_date>2017</publication_date>
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