Experimental Researches on Kromayer's Quartz Mercury Lamp

1908 ◽  
Vol 13 (2) ◽  
pp. 43-54
Author(s):  
H. Bordier ◽  
T. Nogier
Keyword(s):  
Mercury Lamp ◽  
Quartz Mercury ◽  
Experimental Researches

scholarly journals Phosphorescence of mercury vapour after removal of the exciting light

1913 ◽  
Vol 89 (607) ◽  
pp. 39-44 ◽  
Keyword(s):  
Chemical Reactions ◽  
Present Experiment ◽  
The Other ◽  
Exciting Light ◽  
Mercury Vapour ◽  
Mercury Lamp ◽  
Relative Simplicity ◽  
Quartz Mercury ◽  
Long Time ◽  
Sodium Vapour

By means of Becquerel’s phosphoroscope the fluorescence of solids has been shown to be persistent, but up to the present phosphorescence in the case of liquids and gases has not been observed. That of solids has generally been explained as due to chemical reactions brought about by impurities, while in the case of gases it has been considered that damped vibrations of the rapidity of those connected with light could not be conceived as persisting for a sufficiently long time for the necessary observations to be made. On the other hand, because of their relative simplicity, gases and vapours have been recognised as being eminently suitable for the study of fluorescence and kindred phenomena. Wood has applied the phosphoroscope to the case of sodium vapour, with however a negative result. In the present experiment I have attacked the problem in a different way. The method used was to pass a beam of the exciting light transversely across a rapidly moving column of mercury vapour, obtained by distillation in vacuo . Then if the fluorescence of the vapour persists the luminosity should be carried along with the stream. The fluorescence was excited by 2536 light which was obtained by means of a quartz mercury lamp. Under suitable conditions the vapour could be seen to be still fluorescing, after it had passed a distance of some 18 inches from the point of excitation.

A SIMPLE LABORATORY QUARTZ MERCURY LAMP

Science ◽  
1927 ◽  
Vol 65 (1677) ◽  
pp. 187-189
Author(s):  
T. Hashimoto ◽  
C. C. Wu
Keyword(s):  
Mercury Lamp ◽  
Quartz Mercury

A photoelectron microscope study of surfaces

1989 ◽  
Vol 47 ◽  
pp. 10-11
Author(s):  
W. Engel ◽  
M. Kordesch ◽  
A. M. Bradshaw ◽  
E. Zeitler
Keyword(s):  
Electron Microscopy ◽  
High Pressure ◽  
Field Strength ◽  
Uv Light ◽  
Physical Property ◽  
Photon Flux ◽  
Mercury Lamp ◽  
Object Surface ◽  
The Sixties ◽  
Physical Features

Photoelectron microscopy is as old as electron microscopy itself. Electrons liberated from the object surface by photons are utilized to form an image that is a map of the object's emissivity. This physical property is a function of many parameters, some depending on the physical features of the objects and others on the conditions of the instrument rendering the image.The electron-optical situation is tricky, since the lateral resolution increases with the electric field strength at the object's surface. This, in turn, leads to small distances between the electrodes, restricting the photon flux that should be high for the sake of resolution.The electron-optical development came to fruition in the sixties. Figure 1a shows a typical photoelectron image of a polycrystalline tantalum sample irradiated by the UV light of a high-pressure mercury lamp.

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