Xenon, energy diagram

Heats of formation for a complete set of Group VILA fluorides are unavailable, but a set of xenon fluoride cations, isoelectronic with iodine fluorides, exhibits the alternating pattern expected for odd- and even-electron molecules. The original energy-level diagram for stepwise fluorine dissociation is shown in Fig. 5. The tabulated values were derived from the ionization energies of XeF and the threshold values for XeFJ — XeF, - + F, where n is even (27), together with heats of formation obtained by reaction calorimetry (137). 

Figures 7 and 8 contain a diagram and the energy calculations for a simple flash lamp circuit. This xenon flash lamp (Ll) was used to cure films on a torsion pendulum (Figure 9). The theory and manufacture of conventional torsional pendulums have been described elsewhere but a simple diagram and basic calculations for the pendulum are shown in Figures 9 and 10. (iLZj—- Both pigmented and clear coatings were...

Schematics of the calorimetric portions of the experimental apparatus used are included in Figs, la and lb. Figure 2 includes a complete flow diagram of the experimental setup. The calorimetric portion of the apparatus consists of an outer guard, an inner guard, and receiver reservoirs. The guard reservoirs and associated thermal shorting links ensure that the only significant thermal energy transfer to the receiver will be from the infrared black-body radiator or the mercury-xenon source. The absorptance of the receiver surface can then be determined by measuring the vaporization rate of the receiver cryogen.

Figure 33. Properties of the xenon L3-M4 5 G4 Coster-Kronig line as function of the exciting x-ray energy (in eV). Left energies of 5

Because the ionization energy of fluorine is larger than that of xenon, the 2p orbitals of fluorine lie below the 5p orbital of xenon. There are two electrons in the 5p orbital of the xenon atom, and one electron in each of the 2p orbitals of the fluorine atoms. Thus, there are four electrons to feed into the diagram, two occupying the bonding orbital, and two occupying the non-bonding one. 

---