We report x-ray diffraction measurements from highly oriented pyrolytic graphite over the energy range 2 to 8 keV. The measured reflectivity exhibits an energy dependence which closely follows that predicted for an ideally imperfect graphite crystal, although the reflectivity itself is a factor of 1.5 less than the calculated value.
AngelJ. R. P. and WeisskopfM. C., Astron. J.75, 231 (1970).
2.
KestenbaumH.AngelJ. R. P., and NovickR., in New Techniques in Space Astronomy, I.A.U. Symposium No. 41, LabuhnF. and LüstR., Eds. (D. Reidel Publishing Co., Dordrecht, Holland, 1971), p. 137.
3.
WolffR. S., Bull. Am. Astron. Soc.4, 416 (1972).
4.
AngelJ. R. P. and WoodgateB. E., “Bragg Crystal Spectrometer for HEAO-B X-Ray Astronomy Experiment,” presented at the Colloquium on Scientific Significance of the Highly Eccentric Lunar Occultation X-Ray Project (HELOS), organized by the European Space Research Organization, Frascati, Italy, 25–26 May 1972.
5.
LandeckerP. B. and NovickR., “Stellar Bragg Crystal X-Ray Spectrometry on OSO-I,”Ibid.
6.
LandeckerP. B. and NovickR., “Stellar X-Ray Polarimetry on OSO-I,”Ibid.
7.
WeisskopfM. C.BerthelsdorfR.EpsteinG.LinkeR.MitchellD.NovickR., and WolffR. S., Rev. Sci. Instr.43, 967 (1972).
8.
BudickB., private communication' (1972).
9.
GouldR. W.BatesS. R., and SparksC. J., Appl. Spectrosc.22, 549 (1968).
10.
LytleF. W. and BinghamR. G., Boeing Scientific Research Laboratories Document Dl-82-0875, July 1969.
11.
Technical information bulletins on the production and uses of graphite crystals for x-ray applications are available from the Union Carbide Corporation.
12.
ComptonA. H. and AllisonS. K., X-Rays in Theory and Experiment (Van Nostrand, New York, 1935), 2nd ed.
13.
DarwinC. G., Phil. Mag.27, 315 (1914).
14.
DarwinC. G., Phil. Mag.27, 675 (1914).
15.
BirksL. S., private communication (1973).
16.
VierlingJ.GilfrichJ. V., and BirksL. S., Appl. Spectrosc.23, 342 (1969).
