In our previous research , it has been demonstrated that such inelastic processes in atom Rydberg-atom collisions , as chemi-ionization and ( n-n ’ ) mixing , should be considered together .
Here we will review the present state of the art and the actual problems will be discussed .
In this context , we will consider the influence of the ( n-n ’ ) -mixing during a symmetric atom Rydberg-atom collision processes on the intensity of chemi-ionization process .
It will be taken into account H ( 1s ) + H* ( n ) collisional systems , where the principal quantum number n > > 1 .
It will be demonstrated that the inclusion of ( n-n ’ ) mixing in the calculation , influences significantly on the values of chemi-ionization rate coefficients , particularly in the lower part of the block of the Rydberg states .
Different possible channels of the ( n-n ’ ) -mixing influence on chemi-ionization rate coefficients will be demonstrated .
The possibility of interpretation of the ( n-n ’ ) -mixing influence will be considered on the basis of two existing methods for describing of the inelastic processes in symmetrical atom Rydberg-atom collisions .