Abstract
When a singly-charged ion
A
collides with a normal atom
B
an electron may be transferred from 15 to
A
with the result that
A
becomes a neutral atom and
B
becomes a singly-charged ion. If the ionization potential of
A
is greater than that of
B
this process results in an evolution of energy equal to the difference between the ionization energies of
A
and
B
. If a doubly-charged ion
A
collides with a normal atom
B
, an electron being transferred from
B
to
A
during the collision, the process results in two singly-charged ions. The energy liberated in this process is equivalent to the difference between the second ionization potential of
A
and the first ionization potential of
B
. This may be partially or wholly employed in exciting one of the resulting ions or in increasing the kinetic energy of the separating particles.
Reference4 articles.
1. Proc. Roy;M'Ewen;Soc. A,1939
2. The Ionization of Hydrogen by Single Electron Impact
3. Bacher and Goudsmit 1932 Atomic Energy States p. 231. McGraw-Hill Book Co.
4. XI.The passage of positively-charged particles through helium
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