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BAND SPECTRUM AND STRUCTURE OF THE CH+MOLECULE; IDENTIFICATION OF THREE INTERSTELLAR LINES |
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Canadian Journal of Research,
Volume 20a,
Issue 6,
1942,
Page 71-82
A. E. Douglas,
G. Herzberg,
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摘要:
In a discharge through helium, to which a small trace of benzene vapour is added, a new band system of the type1Π –1Σ is found which is shown to be due to the CH+molecule. TheR(0) lines of the 0–0, 1–0, and 2–0 bands of the new system agree exactly with the hitherto unidentified interstellar lines 4232.58, 3957.72, 3745.33 Å, thus proving that CH+is present in interstellar space. At the same time this observation of the band system in absorption shows that the lower state1Σ is the ground state of the CH+molecule. The new bands are closely analogous to the1II –1Σ+BH bands. The analysis of the bands leads to the following vibrational and rotational constants of CH+in its ground state:, Be″ = 14.1767, αe″ = 0.4898 cm.−1. The internuclear distance isre″ = 1.1310∙10−8 cm. (for further molecular constants see Table V). From the vibrational levels of the upper1Π state the heat of dissociation of CH+can be obtained within fairly narrow limits:D0(CH+) = 3.61 ± 0.22 e.v. From this value the ionization potential of CH is derived to beI(CH) = 11.13 ± 0.22 e.v. The bearing of this value on recent work on ionization and dissociation of polyatomic molecules by electron impacts is briefly discusse
ISSN:1923-4287
DOI:10.1139/cjr42a-008
出版商:NRC Research Press
年代:1942
数据来源: NRC
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2. |
THE THEORY OF SOME A-C. COMMUTATOR MOTORS WITH SERIES CHARACTERISTICS: II. THE WINTER-EICHBERG COMPENSATED REPULSION MOTOR |
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Canadian Journal of Research,
Volume 20a,
Issue 6,
1942,
Page 83-95
E. G. Cullwick,
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PDF (396KB)
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摘要:
The method of analysis applied to the simple repulsion motor, in Part I of this paper (1), is now used in a study of the characteristics of the Winter–Eichberg compensated repulsion motor. Elementary explanations of this machine often contain statements that the power factor becomes leading at high speeds, but this is not necessarily true. The effect of the circulating currents in the armature coils short-circuited by the brushes may well be such that the power factor is always lagging and never reaches unity. In the development of the current locus, it is shown how this interesting effect depends on the resistance of the short-circuited coils.
ISSN:1923-4287
DOI:10.1139/cjr42a-009
出版商:NRC Research Press
年代:1942
数据来源: NRC
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