Radical concentration profile

In addition, CH3 and OH radical concentration profiles are depicted in Fig. 9 which were measured using the in situ long path absorption technique described in Ref. 61(a). The OH radical profile was determined from... 

It will be noted that the diffusion coefficient of the radical affects only the first term of the operator 3) in equation (88). This term, which goes to zero as D. -> 0, produces the primary influence of diffusion upon the radical concentration profile. The three terms in equation (88) represent diffusion, convection, and reaction for the chain carriers. These same three physical effects must appear irrespective of the formulation and would also arise in testing criteria for partial equilibria. 

FIGURE 1. Atmospheric OH radical concentration profile annual daytime (12 hr) average, for the northern hemisphere at 30 latitude, as recently calculated by Crutzen and McAfee (73). 

Fig. 10. Typical radical concentration profile generated by the pulsing action of laser on a reaction mixture of photoinitiator and monomer. The maximum free radical concentration [R+ ] is reached immediately after the laser pulse has been applied. It is the sum of the radical concentration formed at each laser fiash, p, and the amount of free radicals still in the system produced by former pulses, [R "].

---