Beta decay is presented in this lecture. The neutrino hypothesis and its relationship with beta decay is discussed. A review of Q value calculations for beta decay is provided. The importance of spin and parity, and how it can be used to assess beta decay, is discussed. Modeling beta decay through the weak force is provided. The impact of Coulomb interactions on positron and electron spectral shape is presented. The use of Kurie plots in understanding beta decay is introduced. Selection rules in beta decay and beta transitions are explained. Calculating logft and its relation to spin and parity are presented. Double beta decay is discussed. The lecture time is 48 minutes. The lecture is assigned on Wednesday 18 January 2017 and due Monday 23 January 2017.
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ReplyDeleteFor question 3.1, How can we calculate the percentage of transmission? It's the same thing as alpha decay branching ratio?
The decay routes are measured. There are some complicated methods to calculate the relative intensities of the different decays. What we covered in the lecture, the logft values, is a simple method that can provide qualitative comparison. The actual values for 99Tc decay can be found in the table of the isotopes or the Lund/LBNL Nuclear Data Search site (http://nucleardata.nuclear.lu.se/toi/)
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