Monday, January 22, 2018
CHEM 418 Nuclear Chemistry, Winter 2018: Lecture 6 Gamma Decay
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.
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ReplyDeletelecture and quiz are done. I wasn't too sure on question 2 though. I don't fully understand the relationship between a parent and daughter in gamma decay. What exactly is the product of gamma decay? Do we end up with the g.s. of what we started with or does it accompany a different decay mode?
ReplyDeleteThe gamma decay is a de-excitation. During an alpha or beta decay, the parent may decay to an excited nuclear state in the daughter isotope. The daughter nucleus goes from an excited state to a less excited state. Ultimately the ground state of the nucleus is reached.
DeleteOk awesome. That's what I thought. Thank you.
DeleteMy pleasure.
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