1. Major Concepts of Physics PHY 102 – Lecture #21 1 2015  Syracuse University Lecture #21 What is radioactivity? April 8 th Spring 2015 Prof. Liviu Movileanu lmovilea@syr.edu Room 211, Physics Bldg., 443-8078 Major Concepts of Physics PHY102

2. Major Concepts of Physics PHY 102 – Lecture #21 2 2015  Syracuse University 1. Review – Binding energy and mass deffect 2. Conservation laws in Radioactive Decay 3. alpha-, beta-, and gama-decays 4. Conceptual Examples 5. Announcements Lecture objectives

3. Major Concepts of Physics PHY102 – Lecture #21 3 2015  Syracuse University Mass defect and binding energy

4. Major Concepts of Physics PHY102 – Lecture #21 4 2015  Syracuse University

5. Major Concepts of Physics PHY102 – Lecture #21 5 2015  Syracuse University Types of radiation and their features

6. Major Concepts of Physics PHY102 – Lecture #21 6 2015  Syracuse University Charges of various radiations

7.  -decay Major Concepts of Physics PHY102 – Lecture #21 7 2015  Syracuse University

8. Major Concepts of Physics PHY 102 – Lecture #21 8 2015  Syracuse University Features of various radiations

9. Major Concepts of Physics PHY102 – Lecture #21 9 2015  Syracuse University Conceptual example 29.5

10. Conceptual example 29.6 Major Concepts of Physics PHY102 – Lecture #21 10 2015  Syracuse University

11. Major Concepts of Physics PHY102 – Lecture #21 11 2015  Syracuse University Radius of a nucleus

12. Major Concepts of Physics PHY102 – Lecture #222009  Syracuse University

13. Major Concepts of Physics PHY102 – Lecture #21 13 2015  Syracuse University Beta-decay

14. Major Concepts of Physics PHY102 – Lecture #21 14 2015  Syracuse University Continuous energy spectrum of electrons emitted in beta-decay

15. Major Concepts of Physics PHY102 – Lecture #21 15 2015  Syracuse University Electron Capture

16. Major Concepts of Physics PHY102 – Lecture #21 16 2015  Syracuse University Gamma decay of Thalium 81 208 Tl

17. Major Concepts of Physics PHY 102 – Lecture #21 17 2015  Syracuse University 1.Reading 1.Reading: Materials are all in Chapter #29. Section 29.3, Radioactivity, Pages 1088-1094 Conceptual examples: 29.5, 29.6, 29.7 2. Homework: HW#9 is due on next week’s lab 3. This week workshop: Reviewing materials for Exam 2 3. Next week’s workshop: 3. Next week’s workshop: Workshop #12 is devoted to Radioactivity.Announcements