homework solutions8

Homework solutions8

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Unformatted text preview: of neutrons already. The actual value for 135Xe is much larger than the calculated σgeom because gaining another neutron will give the nucleus a magic number of neutrons (82). 11. Thermal and cold neutrons usually do not supply the compound nucleus with enough energy to cause particle emission. 13. a) 39 K(n,α)36Cl and b) 14 N(n,p)14C 14. I = I0 e-n’σx I/I0 = e-n’σx ln(I/I0) = -n’σx 35 Cl(n,γ)36Cl I = 0.100 n/s I0 = 1.57 x 104 n/s σ = 2.40 x 103 b = 2.40 x 10-21 cm2/atom n’ = (8.60 g/cm3)([6.022 x 1023 atoms/mol]/112.41 g/mol) = 4.61 x 1022 atoms/cm3 ln(0.100/1.57 x 104) = -(4.61 x 1022 atoms/cm3)(2.40 x 10-21 cm2/atom) x -1.20 x 101 = (-1.11 x 102 cm-1) x x = 0.108 cm...
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This document was uploaded on 03/06/2014 for the course CHEM 481 at CSU Northridge.

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