A grating spectrograph has been constructed using a concave grating with a radius of curvature of 21.07 feet, and ruled at 600 lines/mm. on an aluminum surface.
The plate holder, which is loaded in sections with 2 x 18 inch plates, is 13 feet long, and adequately covers the wave-length range from 2000 A to 15,000 A.
A water cooled Schüler tube, a helium purifying system and a vacuum arc have also been built and put into operation.
The above equipment has been used to investigate the spectra of cadmium, and 51 lines in Cd I and Cd II have been confirmed.
Several promising lines , namely λ 4415.62, λ 3533.71 and λ 3250.11, due respectively to the transitions 5p ²P₁⁰[subscript ½] – 4d⁹ 5s² ²D₂[subscript ½], 5p ²P₁⁰[subscript ½] – 4d⁹ 5s² ²D₁[subscript ½], 5p ²P⁰[subscript ½] – 4d⁹ 5s² ²D₁[subscript ½]
in Cd II have been carefully studied for isotope shift. The 21 foot grating used in this study had not sufficient resolving power to resolve any structure.
A comprehensive table of wave-lengths has been compiled for Cadmium I, II and III. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/41147 |
| Date | January 1950 |
| Creators | Argyle, Sidney Charles |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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