Wednesday, February 13, 2019

CHEM 418 Nuclear Chemistry Winter 2019 Exam 2


Assigned: 16-Feb-19                                                                  
1st Due Date: 21-Feb-19
2nd Due Date:  24-Feb-19                                                                          
Topics:
Lecture 6:  Gamma Decay
Lecture 7:  Fission
Lecture 8:  Nuclear Force and Nuclear Structure
Lecture 9:  Nuclear Reactions
Lecture 10:  Radiation Interactions

Use lecture notes, textbooks, Chart of the Nuclides, Table of the Isotopes, and web pages.  Use the chart of the nuclides as your primary dataset for isotope half-life.   For the 2nd submission show your work and references on a separate page.  Please use 3 significant digits for your answers.

36 comments:

  1. Here's a possible question from lecture 7:
    As the mass of the fissioning nucleus increases, what happens to the mass of the light fragment? What about the heavy fragment?
    How is this reflected in fragments from the fissioning of particularly heavy isotopes, such as 258Fm?

    ReplyDelete
  2. I noticed that the assignment date for exam 2 was yesterday but the exam form is not made available yet on the syllabus page on canvas, and I also cant find it under File. Where can I locate the exam pdf?

    ReplyDelete
  3. The exam was posted at 1130 on Saturday 16 February. If you cannot obtain the exam please let me know. The exam can be found at:

    https://canvas.uw.edu/courses/1254470/discussion_topics/4694779

    ReplyDelete
    Replies
    1. Hello Ken, I can't access to Exam 2 on canvas page as well

      Delete
  4. Ken, for the irradiation calculation for problem 7 (part 3), would the formula be found in lecture 10 under the dosimetry section?

    ReplyDelete
  5. Question 7.3 is actually related to the produced isotope. Lecture 9, page 11 describes excitation functions. Based on the particle energy, a primary reaction product can be identified. This resulting isotope may be identified through gamma decay. You can review the gamma decay chapter to assist with correlating gamma emission energies with specific isotopes.

    ReplyDelete
  6. Will there be another webinar tomorrow for the exam?

    ReplyDelete
    Replies
    1. sure, when would be a suitable webinar time? I propose anytime after 4 PM.

      Delete
    2. 7pm is good, per your E-mail!

      Delete
  7. Canvas conference for Exam 2 on Thursday 21 February, either 4 PM or 7 PM. The default time is 7 PM. If enough people want 4 PM we can switch. Provide your input below. The time will be announced later tonight.

    ReplyDelete
  8. Two more quick questions: for the hot atom chemistry, is the secondary isotope the obvious answer (given the circumstance)? And secondly, is 2.3.3, what lecture series should I refer to.

    ReplyDelete
  9. I have turned over my celebration of learning on both canvas and email. Yay! Learning!

    ReplyDelete
  10. Celebration of Learning 2 has been submitted

    ReplyDelete
  11. Submitted the exam.

    ReplyDelete
  12. Celebration of knowledge is submitted on canvas.

    ReplyDelete
  13. celebration of knowledge is submitted!

    ReplyDelete
  14. Whew, exam submitted.

    ReplyDelete
  15. Submitted last night, forgot to blog

    ReplyDelete
  16. Resubmitted the exam with comments in yellow for sources and such!

    ReplyDelete
  17. submitted last night around 8pm and forgot to comment!

    ReplyDelete
  18. Thanks for the quizzes and comments. If blog posts are late that is fine. As you can tell I sometimes even forget to post the blog (see Np lecture!).

    ReplyDelete
  19. This comment has been removed by the author.

    ReplyDelete
  20. Resubmitted the test corrections (via canvas) for this celebration of knowledge!

    ReplyDelete
  21. I'm satisfied with my first submitted answers, so I'm not sure if I still need to resubmit the same thing?

    ReplyDelete
  22. I resubmitted the exam via Canvas and email. My corrected answers will have a checkmark stamp next to them, and the corresponding work/explanations are included in a separate pdf.

    Also, I realized today that I accidentally uploaded the wrong file on Canvas for my first submission. I'm really sorry if that caused any inconvenience or confusion. I did submit the exam by email also, so there should be proof that I completed the exam by the due date at least.

    ReplyDelete