Thermal neutron capture cross sections

1 barn = 10 (E -24) cm2

1 millibarn = 10 (E -27) cm2

H (1 proton)

333.00 milli barns

D (1 deuteron)

0.52 milli barns

C12

3.50 milli barns

016

0.19 milli barns

H20

2 x 333 + 0.19 =      666.19 milli barns

D2O

2 x 0.52 + 0.19 =         1.23 milli barns

Boron (average of B10 and B11)

760 barns =      760 000 milli barns

Cadmium (avergae of many isotopes)

2 500 barns =   2 500 000 milli barns

From GE Chart of the Nuclides