The spectrum of mercury is excited by hydrogen canal rays. The velocity of the canal rays is regulated by the voltage applied to a discharge tube and the canal-ray particles are allowed to shoot through a small hole in the cathode. Spectrograms were taken at voltages ranging from 1000 to 12,000 volts and the general characteristics of the spectra were studied. The spectra thus excited had very much the same characteristics as the electron spectrum just below ionization with the exception that several spark lines appeared at the lower voltages. The spark lines became more prominent as the voltage was increased although the relative intensity of the arc lines did not change appreciably. The polarization of the light was also investigated but no polarization was detected.
Proceedings of the Iowa Academy of Science
©1931 Iowa Academy of Science, Inc.
"The Spectrum of Mercury Excited by Canal-Ray Impact,"
Proceedings of the Iowa Academy of Science, 38(1), 218-218.
Available at: https://scholarworks.uni.edu/pias/vol38/iss1/66