Adaptation of the X-Ray Milliprobe for the Examination of Small Single Crystals Obtained from Lunar Samples

  • Howard T. EvansJr.
  • Ralph P. Christian


In this laboratory the x-ray milliprobe apparatus is in standard use for the analysis by x-ray fluorescence under x-ray excitation of samples as small as 1 mm in a flat specimen section. The instrument is a General Electric model XRD6 semifocusing spectrometer. In the holder the specimen is bathed in intense tungsten (or chromium) radiation from a type EA-75 dual target x-ray tube, and the excited radiation is collimated by a 1-mm beam tunnel. The collimated x-radiation is then analyzed with a curved LiF crystal and detected with a flow proportional counter. Four different analyzing crystals are available to provide optimum focusing over a wide range of wavelengths. The apparatus and procedure have been described by Rose et al.1


Lunar Sample Beam Tunnel Small Single Crystal Flow Proportional Counter Precession Pattern 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    H. J. Rose, Jr., R. P. Christian, J. R. Lindsay, and R. R. Larson, U. S. Geol. Survey Prof. Paper 650B, B128 (1969).Google Scholar
  2. 2.
    H. T. Evans, Jr., in Proceedings of the Apollo 11 Lunar Science Conference, edited by A. A. Levinson (Pergamon, New York, 1970 ), Vol. 1, p. 399.Google Scholar
  3. 3.
    M. R. Dence, J. A. V. Douglas, A. G. Plant, and R. J. Traill, in Ref. 2, p. 315.Google Scholar
  4. 4.
    K. Keil, T. E. Bunch, and M. Prins, in Ref. 2, p. 561.Google Scholar
  5. 5.
    G. M. Brown, C. H. Emeleus, J. G. Holland, and R. Phillips, in Ref. 2, p. 195.Google Scholar
  6. 6.
    A. El Goresy, P. Ramdohr, and L. A. Taylor, in Proceedings of the Second Lunar Science Conference, edited by A. A. Levinson ( M.I.T. Press, Cambridge, Mass., 1971 ), Vol. 1, p. 219.Google Scholar
  7. 7.
    E. N. Cameron, in Ref. 6, p. 193.Google Scholar
  8. 8.
    F. G. F. Gibb, E. F. Stumpfl, and J. Zussman, Earth Planet. Sci. Lett. 9, 217 (1970).Google Scholar
  9. 9.
    P. E. Champness, A. C. Dunham, F. G. F. Gibb, H. N. Giles, W. S. MacKenzie, E. F. Stumpfl, and J. Zussman, in Ref. 6, p. 359.Google Scholar

Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • Howard T. EvansJr.
    • 1
  • Ralph P. Christian
    • 1
  1. 1.U. S. Geological SurveyUSA

Personalised recommendations