When I print out the material table, or when I use the GetNuclearInterLength() function of the liquidHydrogen and liquidDeuterium materials, I receive the wrong nuclear interaction length.  The value is correct within about 1% for other materials, such as iron.

According to the particle data group, the nuclear interaction length for liquid hydrogen should be 7.346 m and 424.7 m for liquid deuterium.  Below is the output of printing the material table for liquidHydrogen and liquidDeuterium, where the values are incorrect by a large amount.

Material: liquidDeuterium    density: 169.000 mg/cm3  RadL:   7.454 m    Nucl.Int.Length:   2.628 m    Imean:  19.200 eV 
   --->  Element: liquidDeuterium (liqD)   Z =  1.0   N =   2.0   A =   2.01 g/mole
         --->  Isotope: liqD1   Z =  1   N =   1   A =   1.01 g/mole   abundance:  99.99 %
         --->  Isotope: liqD2   Z =  1   N =   2   A =   2.01 g/mole   abundance:   0.01 %
          ElmMassFraction: 100.00 %  ElmAbundance 100.00 % 


Material: liquidHydrogen    density: 70.800 mg/cm3  RadL:   8.923 m    Nucl.Int.Length:   4.993 m    Imean:  19.200 eV 
   --->  Element: Hydrogen (H)   Z =  1.0   N =   1.0   A =   1.01 g/mole
         --->  Isotope:    H1   Z =  1   N =   1   A =   1.01 g/mole   abundance:  99.99 %
         --->  Isotope:    H2   Z =  1   N =   2   A =   2.01 g/mole   abundance:   0.01 %
          ElmMassFraction: 100.00 %  ElmAbundance 100.00 %