Question 287: Atoms & Nuclei

Question

Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t = 0 it was 1600 counts per second and t = 8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t = 6 seconds is close to -

Accepted Answer

at  t = 0,   A
0
= $${{dN} \over {dt}}$$ = 1600C/s
at  t  = 8s,  A  =  100 C/s
$${A \over {{A_0}}}$$  =  $${1 \over {16}}$$  in  8 sec
Therefor half life is t
1/2
=  2 sec
$$ 	herefore $$   Activity  at  t = 6 will  be  1600$${\left( {{1 \over 2}} ight)^3}$$
= 200 C/s

Answer

200

Answer

150

Answer

400

Answer

360

Atoms & Nuclei

Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t = 0 it was 1600 counts per second and t = 8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t = 6 seconds is close to -

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