Natural boron consists of 19.9 a/o of 10 B and 80.1 a/o of 11 B. If a pellet of natural boron is placed in a reactor control rod that sees a neutron flux of 2 x 10 13 neutrons/cm2 -sec, what is the rate per cm 3 that neutrons are absorbed in the pellet? Assume all of the neutrons are thermal neutrons.