Download presentation

Presentation is loading. Please wait.

Published byJasmine Price Modified over 4 years ago

1
Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh). 1 Nuclear Size Alpha particle (+2e) Gold nucleus (+79e) d Quite old!!!

2
Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh). 2 Nuclear Size Closest approach d. E = E Coulomb d = 2kZe 2 /E What about the recoil nucleus? Show that where m N : mass of the nucleus m : mass of alpha What are the values of d for 10, 20, 30 and 40 MeV on Au? How does this explain … ?

3
Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh). 3 Nuclear Shape Crude Nucleons in the nucleus are confined to an approximately spherically symmetric structure Nuclear radius. Deformations…! Consequences….!! Advanced models. HW 5 If it is assumed that the charge is uniformly spherically distributed in a nucleus, show that the electric potential energy of a proton is given by:

4
Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh). 4 Nuclear Mass Nuclear masses measured to high accuracy: mass spectrograph. energy measurement in nuclear reactions. If same B. Absolute measurement

5
Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh). 5 m( 12 C) = 12 u. m( 1 H) with high precision? Relative measurement. Mass Doublet method. Mass 128. Difference in mass between C 9 H 20 and C 10 H 8 = 0.09390032 0.00000012 u = 12m( 1 H) – m( 12 C) m( 1 H) = 1.00782503 0.00000001 u. Usually atomic masses are tabulated. http://physics.nist.gov/cgi-bin/Compositions/stand_alone.pl?ele=&all=all&ascii=ascii&isotype=all Mass of the atom < Zm H + Nm n. Why? Mass decrement = difference between actual mass and mass number: Δ = m – A Δ could be positive or negative. Nuclear Mass

6
Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh). 6 Nuclear Binding Energy B tot (A,Z) = [ Zm H + Nm n - m(A,Z) ] c 2 B m B ave (A,Z) = B tot (A,Z) / A Separation Energy Neutron separation energy: (BE of last neutron) S n = [ m(A-1,Z) + m n – m(A,Z) ] c 2 = B tot (A,Z) - B tot (A-1,Z) Prove that S p = [ m(A-1,Z-1) + m( 1 H) – m(A,Z) ] c 2 = B tot (A,Z) - B tot (A-1,Z-1) Prove that S = ?? HW 6 HW 6 Krane 3.9, 3.12, 3.13 and 3.14. Magic numbers

7
Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh). 7 Nuclear Binding Energy Magic numbers

8
Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh). 8 Nuclear Binding Energy In general X Y + a S a (X) = (m a + m Y –m X ) c 2 = B X –B Y –B a The energy needed to remove a nucleon from a nucleus ~ 8 MeV average binding energy per nucleon (Exceptions???). Nuclear Reactions a + X > Y + b or X(a,b)Y Q-value = [m(a) + m(X) – m(Y) –m(b)] c 2 Solve problem 11.6 in Krane.

9
Nuclear Physics, JU, Second Semester, 2010-2011 (Saed Dababneh). 9 Nuclear Binding Energy Fission Fusion

Similar presentations

OK

Nuclear Models Nuclear force is not yet fully understood.

Nuclear Models Nuclear force is not yet fully understood.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on different types of computer softwares free Ppt on role of entrepreneurship in economic development Ppt on solid dielectrics inc Ppt on polynomials and coordinate geometry transformations Ppt on range of hearing Download ppt on fundamental rights and duties of indian Ppt on forward contracting Ppt on views in dbms software Ppt on phonetic transcription of english words Ppt on history of australia