The mean path length of `alpha`-particles in air under standard conditions is defined by the formula `R =0.98 xx 10^(-27) V_(0)^(3) cm`, where `V_(0)(
The mean path length of `alpha`-particles in air under standard conditions is defined by the formula `R =0.98 xx 10^(-27) V_(0)^(3) cm`, where `V_(0)(cm//s)` is the initial velocity of an `alpha`-particle. Using this formula, final for an `alpha`-particle with initial kinetic energy `7.0 MeV`.
(a) Its mean path length.
(b) The average number of ion pairs formed by the given `alpha`-particle over the whole path R as well as over its first half. Assuming the ion pair formation energy to be equal to 34 eV.
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