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homework solutions7 - Homework Solutions for Chem 481...

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Homework Solutions for Chem 481 Chapter 2 1. 2. a) 23 9 8 4 Pu 6 23 9 4 2 U + 4 2 He b) 6 2 0 7 Co 6 6 2 0 8 Ni + - 0 1 e - + 0 0 ~ ν e c) 11 6 C 6 11 5 B + 0 1 e + + 0 0 ν e d) 20 8 8 3 Bi 6 20 8 8 2 Pb + 0 0 ν e + x-rays + Auger e - 3. Ore samples could be irradiated with neutrons from a 252 Cf source. This will cause fission of uranium if it is present. Downstream from the irradiation site a neutron detector could be positioned to monitor delayed neutrons emitted in the decay of the uranium fission products. 5. Neutrinos have no charge or magnetic moment and have a very small mass so they are not likely to interact with matter, a prerequisite for detection. 6. IC electrons are monoenergetic and have much lower energies than electrons ejected from a nucleus undergoing negatron decay. 7. a) 222 Rn is a member of the 4n+2 decay series which starts with 238 U. b) None of the radionuclides between 238 U and 222 Rn are gaseous, so they are much less likely to be ingested. c) 22 8 2 6 Rn 6 21 8 8 4 Po + 4 2 He d) the 4n+2 decay series ends with 206 Pb 22 8 2 6 Rn 6 20 8 6 2 Pb Δ A = 16 Y 4 α decays 4 α decays Y Δ Z = 8 since actual Δ Z = 4 Y # β - decays = 8 -4 = 4
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Homework Solutions for Chem 481 Chapter 2 8.
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