A point source emitting alpha particles is placed at a distance Im from a counter which...

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A point source emitting alpha particles is placed at a distance Im from a counter which records any alpha particle falling on its 1cm window. If the source contains 6x106 active nuclei and the counter records a rate of 50000 counts/second. Assume that the source emits alpha particles uniformly in all directions and the alpha particles fall nearly normally on the window. The Decay constant of the radioactive process is x107-1. (Upto two decimal place) A point source emitting alpha particles is placed at a distance Im from a counter which records any alpha particle falling on its 1cm window. If the source contains 6x106 active nuclei and the counter records a rate of 50000 counts/second. Assume that the source emits alpha particles uniformly in all directions and the alpha particles fall nearly normally on the window. The Decay constant of the radioactive process is x107-1. (Upto two decimal place)

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