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1. A beam of alpha particles produced a current of 14 picoamps in a parallel-plate ionization...

1. A beam of alpha particles produced a current of 14 picoamps in a parallel-plate ionization chamber for 8 s. The chamber contained air at STP.

(a) How many ion pairs were produced?

(b) How much energy did the beam deposit in the chamber? 3

(c) If the chamber volume was 240 cm , what was the energy absorbed per unit mass in the chamber gas (1 gray absorbed dose = 1 J kg–1 )?

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