The Ultra-Violet Band Spectrum of Nitrogen

A large number of lines in the solar spectrum previously unidentified have been attributed to ammonia by Fowler and Gregory. Their investigation however, referred only to the characteristic ultra-violet band with its centre at about λ 3360, and it seemed desirable to continue the inquiry, in order to determine whether other bands associated with ammonia are also represented in the solar spectrum. One of the bands, in the yellow-green part of the spectrum, about λ 5635, was first observed in vacuum tubes by Schuster, and has since been found to consist of two adjacent bands. Besides this, there is an extended band spectrum ranging through the greater part of the visible region, which appears in the greater part of the visible region, which appears in the flame in the flame of ammonia burning in oxygen, and has been called the "α-band" by Eder and Valenta.

The Effect of Temperature upon the Ultra-Violet Band Spectrum of Ozone and the Structure of this Spectrum

Physical Review ◽

10.1103/physrev.38.330 ◽

1931 ◽

Vol 38 (2) ◽

pp. 330-337 ◽

Cited By ~ 20

Author(s):

Oliver R. Wulf ◽

Eugene H. Melvin

Keyword(s):

Ultra Violet ◽

Effect Of Temperature ◽

Band Spectrum ◽

Violet Band

A New Ultra-violet Band Spectrum of Hydrogen Chloride

Nature ◽

10.1038/123944b0 ◽

1929 ◽

Vol 123 (3112) ◽

pp. 944-944 ◽

Cited By ~ 14

Author(s):

BROOKS A. BRICE ◽

F. A. JENKINS

Keyword(s):

Hydrogen Chloride ◽

Ultra Violet ◽

Band Spectrum ◽

Violet Band

Critical Potentials and the Heat of Dissociation of Hydrogen as Determined from Its Ultra-Violet Band Spectrum

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.12.4.238 ◽

1926 ◽

Vol 12 (4) ◽

pp. 238-244 ◽

Cited By ~ 24

Author(s):

E. E. Witmer

Keyword(s):

Ultra Violet ◽

Band Spectrum ◽

Violet Band ◽

Heat Of Dissociation

Critical Potentials and the Heat of Dissociation of Hydrogen as Determined from its Ultra-Violet Band Spectrum

Physical Review ◽

10.1103/physrev.28.1223 ◽

1926 ◽

Vol 28 (6) ◽

pp. 1223-1241 ◽

Cited By ~ 34

Author(s):

Enos E. Witmer

Keyword(s):

Ultra Violet ◽

Band Spectrum ◽

Violet Band ◽

Heat Of Dissociation

Ultra-Violet Band System of Silicon Monoselenide

Nature ◽

10.1038/142434a0 ◽

1938 ◽

Vol 142 (3592) ◽

pp. 434-434 ◽

Cited By ~ 2

Author(s):

R. F. BARROW

Keyword(s):

Band System ◽

Ultra Violet ◽

Violet Band

The ultra-violet band-system of carbon monosulphide and its relation to those of carbon monoxide ( the “4th positive” bands) and silicon monoxide

Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character ◽

10.1098/rspa.1928.0004 ◽

1928 ◽

Vol 117 (777) ◽

pp. 351-375 ◽

Cited By ~ 18

Keyword(s):

Band System ◽

Carbon Disulphide ◽

Ultra Violet ◽

Silicon Monoxide ◽

Positive System ◽

Quantum Analysis ◽

Constant Change ◽

Group A ◽

Carbon Arc ◽

Violet Band

In 1913 L. C. Martin discovered an ultra-violet band-system in the tube discharge through carbon disulphide vapour and in the carbon arc fed with sulphur, and ascribed it, on experimental evidence, to the CS molecule. The bands are degraded towards the red, and the majority of them are double headed. Martin arranged all but seven of the observed bands into seven groups (A, B, ... G) each formed by closely neighbouring bands. The present communication records the quantum analysis of the band-heads, and the substantial similarity of structure between this CS system, the ultra-violet systemof SiO and the “4th Positive” system of CO. A brief examination of the photographs reproduced by Martin and of the wave-numbers derived from his tabulated wave-lengths leads to a Deslandres scheme for the band-heads and to a plausible assignment of the initial and final vibrational quantum numbers, n ', n ". In this scheme each of Martin’s seven groups is a sequence of bands corresponding to a constant change of vibrational quantum number, n "— n ', except that groups B and C together with one band of group A form only one sequence, n "— n ' = — 2. It further appears that of the pair of heads (bracketed in Martin’s table of data) of each double headed band, the less refrangible head is formed by a Q branch, the corresponding P branch having, of course, no head, and therefore remaining undetected with the dispersion employed by Martin (about 7.8 A./mm. at λ 2420 to 12.7 A./mm. at λ 2850).

Some New Ultra-violet Band Systems of Selenides and Tellurides of Tin and Lead

Nature ◽

10.1038/157663a0 ◽

1946 ◽

Vol 157 (3994) ◽

pp. 663-663 ◽

Cited By ~ 7

Author(s):

DEVENDRA SHARMA

Keyword(s):

Ultra Violet ◽

Violet Band