Concave Spherical Crystals of Barium-Copper-Stearate for Use in Long Wave-Length X-Ray Spectrometers
- 1 April 1940
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 11 (4) , 111-114
- https://doi.org/10.1063/1.1751662
Abstract
To perform the double function of diffracting and focusing a monochromatic beam of x-rays, multiple monomolecular layers of barium-copper-stearate were deposited upon an accurately ground concave spherical surface of glass. With a spherical crystal of radius of 218 cm, grating space of about 50.5A, preliminary photographs of the Al Kα,β region, component lines not resolved, were obtained in 30 minutes at 3 kv and 15 ma. It is believed that the intensity and resolving power from such a spherical grating are adequate for measurements with an ionization chamber of absorption coefficients at wave-lengths above 8A.Keywords
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