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Unformatted text preview: te the energy release or the Q values of the following fission reactions:
a) 0n1 + 92U235 3 0n1 + 53I137 + 39Y96
b) 0n1 + 92U235 3 0n1 + 54Xe136 + 38Sr97
c) 0n1 + 92U235 2 0n1 + 56Ba137 + 36Kr97
Show the data you used in your calculations and mention their source. Feb. 15 For the four fusion reactions:
1. 1D2 + 1T3
2. 1D2 + 1D2
3. 1D2 + 1D2
4. 1D2 + 2He3
Apply conservation of momentum to determine the energies carried by the resulting
product particles and nuclei. Feb. 17 For the naturally occurring nuclides, use a plotting routine to display the nuclear
stability graph of the atomic number Z, against neutron number N.
Discuss briefly the general features for the generated graph, for instance the
positions of the magic numbers, where the proton and neutron rich nuclei are, their
favored modes of radioactive decay, the heavy elements island of stability and the
departure from the line Z=N for the heavy nuclei. Feb. 20 Calculate the Q values of the following nuclear reactions:
a) 9F18 8O18 + +1e0 + ν (Positron decay reaction)
b) 6C11 5B11 + +1e0 + ν (Positron decay reaction)
c) 29Cu64 + -1e0 28Ni64 + ν (neutrino) (Orbital electron capture reaction)
d) 1T3 -1e0 + 2He3 + ν* (antineutrino) (Negative beta decay reaction)
e) 94Pu239 2He4 + 92U235 (Alpha particle decay reaction) Feb. 22 1. Use either form of the law of radioactive decay to plot the decay curve N(t)/N0
for tritium, 1T3, as a function of time t.
2. Plot the decay curve for Pu239.
3. Plot the decay curve for U235.
Data mine for the half-lives of these isotopes in the Table of the Nuclides. Feb. 24 Consider the isotope Ra226. Using Avogadro’s law, calculate its specific activity or
the activity of 1 gram of material in the SI system’s unit of Becquerel (Bq).
Discuss its relationship to the conventional system’s Curie (Ci) unit of activity.
You can obtain the half life of the radium226 isotope from the Table of the Nuclides. You may wish to use the links on the class’ web page to data mine for information
The production of Carbon14 with a half life of 5730 years is an ongoing nuclear
transformation from the neutrons originating from cosmic rays bombarding
Nitrogen14 in the Earth’s atmosphere:
0 n1 + 7 N 14 → 1 H 1 + 6 C14
6 C14 → −1 e0 + 7 N 14 −−−−−−−−−−−−−−
0 14 Feb. 20 Mar. 1st n1 → −1 e0 + 1 H 1 Where Nitrogen14 and Carbon14 appear as catalysts in the overall reaction leading to
the disintegration of a neutron into a proton and an electron.
The atmospheric radiocarbon exists as C14O2 and is inhaled by all fauna and flora.
Because only living plants continue to incorporate C14, and stop incorporating it
after death, it is possible to determine the age of organic archaeological artifacts...
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This note was uploaded on 01/24/2014 for the course NPRE 402 taught by Professor Ragheb,m during the Winter '08 term at University of Illinois, Urbana Champaign.
- Winter '08