The specific rate function k E as an inverse Laplace transform

At infinite pressure, as we argued in Chapter 1, the rate of replenishment of the reactive molecular states is so fast that even allowing for the decay processes, the populations of these states remain at their Boltzmann equilibrium values. Hence, we can write 

1 It is convenient at some point to slide over from the molecular units e, k, as used in equations (3.10H3.13), to the practical units E, R, used by practising kineticists. 

2 For a few molecules which span our general range of interest, e.g. CO2, CHjNC, cyclo-C4H8, C2F6, the densities of (rotation-vibration) states at the thermal thresholds are approximately 10 , 10 , 10 , 10 states per wavenumber respectively. 

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The specific rate function k(E) as an inverse Laplace transform... 

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