5-32 Jezebel is a bare, fast, spherically shaped critical reactor constructed of pure 239Pu metal (density 15.4 g/cm³). Calculate the critical radius and critical mass of the reactor using the one-group data: 2.98, 1.85 b, = 0.26 b, and σ = 6.8 b.
5-33 There has been considerable interest in the possibility of super heavy nuclei with mass numbers A > 300. Such nuclei would be characterized by large values of σ (~6-10) and mass of a bare sphere of such material.