Thursday, January 5, 2017

CHEM 418 Nuclear Chemistry, Winter 2017: Lecture 2 Nuclear Properties

A discussion on systematics of nuclear properties are presented.  Mass, mass excess, and mass distribution within the nucleus is presented.   Mass excess data are used to calculate energies in decays.  Equations for determining nuclear radii are provided.  Models that are used to describe the stability of nuclei are introduced.  Nuclear shapes and structures are introduced. The lecture time is 48 minutes.  There is a 3 minute supplemental lecture on the Brookhaven National Laboratory (BNL) Q-value calculator (Links to an external site.).  The Russian site Q-value calculator (http://nrv.jinr.ru/nrv/webnrv/qcalc/ (Links to an external site.)) has recently been unreachable.
The lecture is assigned on Friday 6 January 2017 and due Wednesday 11 January.
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20 comments:

  1. Ken CzerwinskiJanuary 9, 2017 at 4:29 PM

    Thanks for pdf quiz 2. I will review your answers and provide feedback if needed.

    ReplyDelete
  2. UnknownJanuary 10, 2017 at 4:42 PM

    Viewed and submitted!
    I was wondering about determining the nuclear radius by scattering of charged particles: I would think this would determine the radius of the Coulomb force of the nucleus and not the radius of the nucleus itself. How do you determine the actual nuclear radius from scattering?

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    Replies
    1. Ken CzerwinskiJanuary 10, 2017 at 11:15 PM

      You are correct. The charged particles actually interact with the Coulomb barrier. This is the reason the measured nuclear radius will vary with particle charge and energy. Particle interactions with the nucleus will be discussed in more detail in the lecture on nuclear interactions.

      Delete
  3. Paul SimJanuary 10, 2017 at 7:22 PM

    Lecture viewed and pdf quiz 2 submitted via e-mail.
    I learned that the 4 stable odd-odd nuclei are H2, Li, B10, and N14. Among the examples on question 1, there is Be12. On the lecture slide, however, I cannot find Be12 from the table. This might be a trivial question. Does Be12 exist? Thanks in advance!

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    Replies
    1. Ken CzerwinskiJanuary 10, 2017 at 11:17 PM

      Yes, 12Be does exist. You can find this in the chart of the nuclides. You can also search for isotopes at: http://www.nndc.bnl.gov/chart/chartNuc.jsp

      Delete
  4. AnonymousJanuary 10, 2017 at 7:32 PM

    Viewed and submitted, thanks!

    ReplyDelete
  5. AnonymousJanuary 10, 2017 at 8:25 PM

    I viewed the lecture and submitted Quiz #2 by email.

    ReplyDelete
  6. AnonymousJanuary 10, 2017 at 8:28 PM

    Lecture 2 has been reviewed and the PDF quiz has been submitted.

    ReplyDelete
  7. AnonymousJanuary 11, 2017 at 8:12 PM

    Lecture 2 and quiz 2 have been viewed and submitted

    ReplyDelete
  8. AnonymousJanuary 11, 2017 at 10:40 PM

    Lecture 2 and quiz 2 have been submitted.

    ReplyDelete
    Replies
    1. Ken CzerwinskiJanuary 11, 2017 at 11:48 PM

      thanks for the submission. Please see the e-mail I sent you.

      Delete
  9. AnonymousJanuary 11, 2017 at 11:03 PM

    Lecture 2 has been reviewed and the quiz 2 has been submitted.

    ReplyDelete
  10. UnknownJanuary 11, 2017 at 11:05 PM

    Lecture 2 and quiz 2 pdf have been viewed and submitted

    ReplyDelete
  11. Ken CzerwinskiJanuary 13, 2017 at 2:48 PM

    Comment on Q value calculator. For positron decay value is given by Qβ+. Qp is for proton emission.

    ReplyDelete

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