A general overview of nuclear fission is presented. The probability of fission is described based on developed models including the liquid drop model and shell corrections. Discussion on spontaneous fission and fissioning isomers is given. The transition nucleus and fission product distributions are discussed. The total kinetic energy, mass distribution, and charge distribution during fission are presented. Changes in fission product distribution with parent properties are introduced. Delayed neutrons from fission and their role in reactors are given. Proton induced fission is introduced. The lecture time is 41 minutes.
The lecture is assigned on Tuesday 23 January 2018 and due Sunday 28 January 2018. The answers to the Lecture 7 PDF quiz will be posted Monday 29 January 2018.
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ReplyDeleteLecture gets clipped at 6:09, cutting off part of your explanation. Could you please finish what you were trying to say at that point in the lecture?
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ReplyDeleteLecture + Quiz submitted. I had a hard time trying to answer the very last question. Where in the video lecture did you talk about it?
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ReplyDeleteLecture 7 viewed and quiz 7 submitted. I also had a hard time solving the last question.
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ReplyDeleteThanks for the comments. I will fix the audio clip that was identified as problematic.
ReplyDeleteFor Question 2 of the PDF quiz, the answers are on pages 5 and 6 of the lectures.
ReplyDeleteOn page 6 fission yields are shown for a number of heavy actinides. The slide states that heavier isotopes begin to demonstrate symmetric fission. Data is shown for the symmetric fission product distribution of 258No. The reasons for the symmetric fission include fission products with a Z near 50 can be formed and the light fraction mass increases due to the stability induced by 132Sn.
The 2nd part of question 2 can be answered from information on slide 5. The first bullet point states the asymmetric fission of the light actinides is due to shell effects and magic numbers. The heavy fragment is near A=132, as Z=50 and N=82 is doubly magic. This is 132Sn.
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