6. A beam of 0.0253 eV neutrons that has a cross-sectional area of 10-6 m2 strikes...

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6. A beam of 0.0253 eV neutrons that has a cross-sectional area of 10-6 m2 strikes a thin "Li target inducing the exothermic reaction Li(n,a) H. The beam intensity is 5x1013 neutrons/m2- sec. The target has a thin thickness of 2×10- m (i.e., all atoms are affected by the beam). The cross-section for this reaction at 0.0253 eV is 940 barns. The half-life of 'H is approximately 12 years. The density of lithium is 0.53 g/cm', atomic weight is 6.942, and the abundance value is 92.5 alo for 'Li 7.42 a/o for Li. (5 points) a) Calculate the velocity of a beam of neutron (1 point) b) What is the density of neutrons in the beam? (1 point) c) What is the atom density of the target? (1 point) d) What is the rate of produetion of tritium in the target? (2 points) 6. A beam of 0.0253 eV neutrons that has a cross-sectional area of 10-6 m2 strikes a thin "Li target inducing the exothermic reaction Li(n,a) H. The beam intensity is 5x1013 neutrons/m2- sec. The target has a thin thickness of 2×10- m (i.e., all atoms are affected by the beam). The cross-section for this reaction at 0.0253 eV is 940 barns. The half-life of 'H is approximately 12 years. The density of lithium is 0.53 g/cm', atomic weight is 6.942, and the abundance value is 92.5 alo for 'Li 7.42 a/o for Li. (5 points) a) Calculate the velocity of a beam of neutron (1 point) b) What is the density of neutrons in the beam? (1 point) c) What is the atom density of the target? (1 point) d) What is the rate of produetion of tritium in the target? (2 points)