The Morse potential, Eq. (2). The horizontal line represents the total energy of a colliding pair of atoms which is conserved, and is the well depth at the separation . The atomic constants used in the plot shown are , , , and (atomic mass). These values are appropriate for Ar–Xe (Ref. 6). The same values of the parameters apply for all the figures, unless noted.
The dimensionless spectral function vs frequency in , for , computed from the trajectory for , Eq. (20), and from the Levine-Birnbaum shape [Eq. (A2)] with and (see the Appendix). The value used in the figure corresponds to a relative velocity of collision at infinite separation of (Ref. 6).
The dimensionless energy emission per collision vs wave number for , computed from the trajectory for , Eq. (20), and from the Levine-Birnbaum shape [Eq. (A2)] using the same parameters and molecular constants as in Fig. 2.
The reduced spectral function in dimensionless units vs frequency in for , , and various values of , the depth of the potential well, according to Eq. (22).
Energy emission per collision in dimensionless units vs frequency in for the same and values of parameters as in Fig. 4.
The variation of reduced spectral function in dimensionless units for different values of the ratio of the range of the exponential induced dipole and Morse potential [see Eq. (28)].
Energy emission per collision in dimensionless units vs frequency in for the same values of parameters as in Fig. 6. Note that the intensities of the spectra for the cases and are much reduced compared with that of the spectrum for the case . This occurs because in the former two cases the strongest portion of the intensity of is near zero frequency where the factor drastically reduces the emission.
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