Merge pull request #7 from cnerg/anu1217-branch

SphericalShell/README.md

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+# Spherical Shell Problem ReadMe File
+
+Describes the basic parameters of the spherical shell/point source problem.
+
+## 1. Source Type
+* Point source of monoenergetic (14 MeV) neutrons at origin (0,0,0)
+## 2. Materials
+* Tungsten shell - natural abundances, density = 19.6 g/cm3
+* Void everywhere else
+## 3. Geometry
+* Thin spherical shell with r_in = 1000cm and r_out=1005cm, centered at origin (0,0,0)
+## 4. Boundary Conditions
+* Vacuum boundary condition to ensure particles do not enter void space at r>r_out
+## 5. Tallies
+* Elastic
+* Absorption
+* Flux