Internal excitation energy

Consider N fermions in a box with fixed energy levels E, (including rest-mass which itself includes internal excitation energy). To each E, there correspond co, distinct (degenerate) states, made up of gi internal states and 4n Vp2dp/h3 kinetic degrees of freedom, where p is momentum and V is the volume. 

Fig, 8. Lifetimes i, of n = 5, 10, 20 and 40 atom clusters as a function of the relative excitation energy. For a fixed experimental time window (10" -10" s) the clusters have different but relatively narrow internal excitation energies. 

I denotes K Pi), I denotes li P ). Eavi is the elFective available energy (see discussion following eqn (2)). Et is the total translational energy of both fragments (peak values from fig. 2). is the internal excitation energy of the alkyl radical, and is its total energy (translational plus internal). 

If the reaction A -i- BC AB + C proceeds by spectator stripping, the internal excitation energy of the product AB ion is given by... 

An assumption of the method is that the average internal excitation energies for the pure and diluted recoil systems are approximately the same. One-dimensional recoil trajectory calculations in the energy coordinate for translational cooling of hot hydrogen atoms have focused on this... 

TABLE III. The Effect of Internal Excitation Energy of Ionic and Neutral Reactants on Reaction Rates... 

Most of the available data have been obtained for reactants which are not state-selected and the important role of internal excitation energy is becoming increasingly apparent (Section 3.6.1). A major emphasis must now be given to establishing the reliability of these data. While reactant ion production by electron impact is unsatisfactory because it is not specific, important methods have been developed to analyze the distribution of electronic... 

Table 4.1 Summary of relevant chemical process in an excimer laser, exemplified for XeCl. KE kinetic energy. M elastic-collision atom without internal excitation energy...

In the first step the two atoms combine to form a diatomic molecule, Aj, where the asterisk denotes non-thermal internal excitation energy. The excitation energy comes from the bond energy of the newly formed molecule plus thermal energy carried by the atoms. A2 will redissociate in one vibrational period unless energy is removed by collisions with M. Applying a steady state, d[A2]/dt — 0, gives the rate expression... 

The molecular Ions formed Initially by electron Impact are considered to contain Internal excitation energy. Some of these Ions react to form product Ions, while the others undergo... 

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