1. A radiation case, comprising:
(a) a radiation-proof door; and
(b) a radiation-proof main section, the radiation proof main section comprising a back portion, a floor portion, a ceiling
portion and side portions, vertical cavities formed in the back portion, the vertical cavities being a selected distance from
a surface of a back wall of the back portion, radiation rods located in the vertical cavities, each radiation rod containing
a cobalt-60 pellet, the selected distance between the vertical cavities and the surface of the back wall of the back portion
being less than a maximum penetration distance for gamma rays coming out of each cobalt-60 pellet.
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