Loadable Function: a = CSb_FluorLine (Z, line, E)

Fluorescent line cross section (barn/atom)

          Z : atomic number
          E : energy (keV)
          line :
          KA_LINE 0
          KB_LINE 1
          LA_LINE 2
          LB_LINE 3
          (Individual lines are also defined with negative flags
          See file lines.h in src directory for equivalences.)