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Homework Help: GM tube question to obtain number of disintegrations per second

  1. Feb 1, 2010 #1
    1. The problem statement, all variables and given/known data

    A point source of alpha particles, a tiny mass of the nuclide Am (atomic number 95, mass number 241) is mounted 7cm in front of a GM tube whose mica window has a receiving area of 3cm2. The counter linked to the GM tube records 54000 counts per minute.
    a. the number of disintegrations per second within the source.
    b. the number of Am atoms in the source
    (decay constant = 4.80 x 10^-11)

    2. Relevant equations

    3. The attempt at a solution

    i am stumped at this question as i am new to radioactivity

    Attached Files:

  2. jcsd
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