| 1. |
THE SPECTRUM OF TREBLY IONIZED CERIUM |
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Canadian Journal of Research,
Volume 14a,
Issue 7,
1936,
Page 127-130
R. J. Lang,
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摘要:
The discovery of two members of the F series made it possible to obtain a fuller analysis of this spectrum. The following terms are located: 6S, 7S, 8S, 6P, 5D, 6D, 7D, 4F, 5F, 5G and 6G. Some thirty lines are classified. The deepest term, 4F, has an absolute value of approximately 296197 cm.−1based upon the three S terms and the use of a Ritz formula, giving an ionization potential of 36.5 volts.
ISSN:1923-4287
DOI:10.1139/cjr36a-013
出版商:NRC Research Press
年代:1936
数据来源: NRC
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| 2. |
A CONVENIENT MICROPROJECTION APPARATUS |
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Canadian Journal of Research,
Volume 14a,
Issue 7,
1936,
Page 131-133
P. Larose,
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摘要:
not available
ISSN:1923-4287
DOI:10.1139/cjr36a-014
出版商:NRC Research Press
年代:1936
数据来源: NRC
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| 3. |
AN ELECTRONIC SPEED GOVERNOR |
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Canadian Journal of Research,
Volume 14a,
Issue 7,
1936,
Page 134-138
B. G. Ballard,
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摘要:
Erratic performance of certain centrifugally governed electric motors prompted a search for a speed control that would be free from the effects of poor contacts, spring creepage, and friction in moving parts. These troubles were overcome by impressing a suitable alternating potential on the motor armature windings so that the rotor turned in synchronism with the alternating current system. The frequency of the latter was determined by a vacuum tube oscillator, and sufficient power obtained by amplifying the oscillator output with an inverter. Subsequent performance has proved very satisfactory.
ISSN:1923-4287
DOI:10.1139/cjr36a-015
出版商:NRC Research Press
年代:1936
数据来源: NRC
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| 4. |
THE HYPERFINE STRUCTURE SEPARATIONS OF SOME TERMS IN THE THALLIUM II SPECTRUM |
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Canadian Journal of Research,
Volume 14a,
Issue 7,
1936,
Page 139-151
Stanley Smith,
J. Convey,
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摘要:
The hyperfine structure separations of about 25 terms of T1 II have been measured by means of two quartz and two glass Lummer plates used in conjunction with a Hilger E1 spectrograph. The light source was a hollow cathode discharge in helium. Large isotope displacements have been found in some of the terms of the 5d96s26pconfiguration, also in the 6p23P2and 6p21D2terms. The results have been used to calculateg(I) and to examine the validity of the application of the summation rules to the separation factors for the 6sndand 6snfconfigurations. The spacing of the system of levels arising from the 6s6fconfiguration has been examined.
ISSN:1923-4287
DOI:10.1139/cjr36a-016
出版商:NRC Research Press
年代:1936
数据来源: NRC
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