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Problem 4. Boral is the material composed of 50 % Al, 40 % B, and 10...

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Physics

Problem 4. Boral isthe material composed of 50 % Al, 40 % B, and 10 % C by weight. Itsdensity is 2.56 g/cm3. A beam of0.025-eV neutrons with intensity of5´106neutrons/(cm2×s)strikes a target of 2.5 cm2 in area made of theboral.

  1. Calculate the atom densities of Al, B, and C in boral.
  2. Calculate the macroscopic cross-sections Sa,Ss, and St for boral at the neutron energy0.025 eV.
  3. How thick must the boral target be in order to reduce theintensity of such neutron beam by a factor of 7 ?

Answer & Explanation Solved by verified expert
4.4 Ratings (703 Votes)
BoralAvogadro number Na 602 e23Al mass number 27Atomic density in Boral 2560527 602e23 473 e21ccBoran A 10Atomic density    See Answer
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