Gross collision model

Now (and further) we shall employ an important self-consistent Gross collision model. We shall represent the Gross induced distribution F = Fq as... 

In this collision model (i) the velocity distribution function is assumed to be unperturbed by ax. field (ii) the employed induced distribution F in GT and in VIG was termed the correlation-orientation distribution, since in the work by Gross [37] the case g = 1 was originally considered. Here the term Gross collision model is ascribed to an arbitrary g-value, which is involved in Eq. (30). 

Let us now denote as Xd the maximum loss value y"ax attained at x = xd-It is shown in VIG, Section 6, that for the Gross collision model our... 

As was mentioned in Section II.A.6, in the Gross collision model the angular velocities, unlike the orientations, are considered to be uncorrelated at an instant of a strong collision. 

In particular, we use Eq. (142), derived for the Gross collision model in GT and VIG. Note that the application of the isothermal collision model [GT, p. 192 see also Eq. (370) in Section VII], gives for liquid CH3F, where the dimensionless collision frequency y is large, unreasonable absorption spectrum. 

For the Gross collision model, using Eq. (258b), we finally have... 

For calculations of the water spectra, we have applied (in Section VII. A.5) the Gross collision model, since it gives a good agreement with the experimental spectra and is more simple than the isothermal collision model.56... 

We employ the Gross collision model for which this susceptibility xor[z(v)] is related to the correlator ( spectral function ) Lor of the hat model as... 

Second, the SF (254) is used in the case of the Gross collision model as a constitutive element of the formula for the complex susceptibility Xg I 1 this case the orientational distribution Fq, differing from FB, changes radically the calculated low-frequency spectrum, while the far-IR spectrum is very close to that given by the Boltzmann susceptibility Xb (252). We shall return to this point in Section IX.D. 

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