Abstract
Measurements have been made of collision detachment cross-sections for O
–
in O
2
, N
2
, H
2
O, H
–
in H
2
, O
–
in O
2
and Cl
–
in Cl
2
between 10 and 2500 eV. Values obtained, ~ 5 x 10
–16
cm
2
at 10 eV, make it likely that this detachment process is of significance in the removal of negative ions from positive columns of discharges where such energies may be found. It is possible to distinguish qualitatively between a detachment and a charge transfer collision, and in all cases studied except in O
2
–
, in O
2
, the charge transfer is found to be negligible.
Reference2 articles.
1. B ates D. R . & Massey H . S. W . 1954 Phil.
2. A p p l. Sci;Boyd R .;Res. B,1955
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