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How many negative ions are there? 

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A simple analysis shows that a strong plasma flow could enhance the surface production of negative ions.
Negative ions provide an excellent tool for materials processing applications.
The application of confinig field results in significantly increased negative ions yield.
It is shown that relaxation and correlation effects are very important for the negative ions.
Moreover, it is shown that ion-pair formation cannot account for the total yield of negative ions.
The same approach is applicable to a wide range of negative ions.
The results obtained contribute to refinement of the available literature data for the sought negative ions.
The results improve the data available in the literature for these negative ions.
The results give more knowledge of the long-lived negative ions formation.

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