Radiation Absorption between the Ultraviolet and X-ray Bands

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Science  29 Jul 1966:
Vol. 153, Issue 3735, pp. 522-525
DOI: 10.1126/science.153.3735.522


The recent initial exploration of photoabsorption in a previously unmapped portion of the spectrum, photon energies between approximately 20 and 500 electron volts or wavelengths between 20 and 600 angstroms, is reviewed.