ne.gif (2791 bytes)     NE406 Radiation Protection and Shielding

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Lesson 21 - Uncollided  dose from distributed sources 

In this two-class lesson, we will be taking the final result of Lesson 20, the equation for the monoenergetic point source in a homogeneous attenuating medium:

and extending it in space to cover sources that have a more detailed shape than a point.  We will not cover all the variations developed in the text, but I want to do enough to give you a good feel for the process (and a little practice on your calculus).

In class, we are going to develop a single example for each of the increasing dimensionalities:

  • 1D -- a line source (Section 6.2.1)
  • 2D -- a disk source (Section 6.2.2)
  • 3D -- a slab source (Section 6.2.6, although we will look at it a little differently than the text)
    • Come to class prepared to work through the derivations.

    In addition, we will work through some examples as a class to give you practice.
     

    Exercise:

    Pedro owns a fruit stand.  He sells apples for 50 cents each and bananas for 40 cents each.  Each morning he brings the same number of each type to sell.  One day at noon, he noticed that he had $19.50 and twice as many apples as bananas.  How many of each had he sold?

    (Okay.  This has nothing to do with shielding.  But this was a homework problem in my son's 5th grade math book, and I thought I was going to pull my hair out before I solved it.)
     

    mailbox.gif (2541 bytes)Subject: 5th Grade 


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