Mercury energy distribution

The energy distribution for the commonly used 450-W Hanovia medium-pressure mercury lamp is given in Table 2.5. 

ENERGY DISTRIBUTION IN LOW- AND MEDIUM-PRESSURE MERCURY ARCS ... 

This formula can be used to calculate the surface energy of a liquid when both the intermolecular potential and the distribution function are known. Thus, the distribution function of liquid argon obtained by Eisenstein and Gingrich10 and the known intermolecular potential give Ucaic = 27 erg/cm2, while the observed value, that is, the value obtained from the observed values of surface tension by Eq. 11.12, is U0bs = 35 erg/cm2. For mercury the distribution functions obtained by Boyd and Wake-ham5 and the interatomic potential obtained by Hildebrand, Wakeham, and Boyd16 can be used. The calculated value is Ucaie = 490 erg/cm2, which can be compared with the observed value Uohs = 500 erg/cm2. 

Pig. 10. Energy distribution of various artificial ultraviolet sources, (a) Sunlight, (b) xenon arc, (c) carbon arc, (d) mercury lamp, (e) fluorescent lamp [reproduced with permission from Ref. 15],... 

This shows a profusion of lines of high intensity. The relative energy distributions in the low and medium pressure mercury arcs are compared in Table 1. 

Work on energy distributions in double photoionization of complex atoms has so far touched only closed-shell species, the rare gases, mercury, and cadmium. Results are discussed in the following sections according to the energy regime covered. 

Fig. 6. SpectFal solar and mercury-xenon lamp energy distribution.

Figure 6.2. Energy distribution of the sunlight spectrum. A. Monochromatic mercury lamp at 254 nm. B. Black light lamp. (From Crosby, 1972.) American Chemical Society. Reprinted with permission.

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