Grating Vacuum Monochromator for the Spectral Range 1000–6500 A

Abstract
In order to get information about the excitation processes in a discharge tube, a spectrograph has been built, which scans the range between the visible and the far ultraviolet. Using a Paschen-Runge mounting the spectrum has been detected with a cooled E.M.I. photomultiplier, which can move along the Rowland circle with a velocity of 0.1–12 A per second. At the wavelength of 2500 A, 0.6 A could be resolved.
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