Gamma decay is described in two lectures. The first lecture covers the fundamentals of gamma decay and second lecture describes Moessbauer spectroscopy. Different methods to find data on gamma decay yields for decay of isotopes are presented. The energetics involved in gamma decay are provided. This includes recoil from gamma, which is exploited in Moessbauer spectroscopy. Decay types in gamma transitions are explained, focusing on electromagnetic basis for the gamma emission. Transition probabilities and internal conversions inherent to gamma decay are covered. Isotope examples for internal conversion electrons are given. Angular correlations in gamma decay are described with an experimental example provided. The use of gamma decay in Moessbauer spectroscopy is discussed. Part 1 is 34 minutes and part 2 is 28 minutes.
The lecture is assigned on Thursday 24 January 2019 and due Tuesday 29 January 2019. If needed the PDF quiz can be submitted late due to Exam 1; prior notification is required. When you have completed the lecture please respond to the Lecture 6 PDF quiz. The answers to the Lecture 6 PDF quiz will be posted Wednesday 30 January 2019.
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ReplyDeleteHow do we find the photon activity when given the photon energy? I'm having trouble finding it from the lecture material.
ReplyDeleteDiscussion on photon yields are presented starting on page 3 of the lecture. For an isotope the gamma intensity changes with the different gamma energies due to the excited state transitions. On page 5 of the lecture sites are listed to find the gamma yields. One site is:
Deletehttp://nucleardata.nuclear.lu.se/toi/radSearch.asp
You can enter the isotope and the gamma yields are provided.
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