Download presentation

Presentation is loading. Please wait.

Published byClement Carpenter Modified over 3 years ago

1
NE 301 - Introduction to Nuclear Science Spring 2012 Classroom Session 6: Rates of Nuclear Decay Transient Equilibrium Secular Equilibrium No Equilibrium Branching Growth of Products in a Neutron Flux Transient Equilibrium Secular Equilibrium No Equilibrium Radiation Interaction with Matter

2
Reminder Load TurningPoint Reset slides Load List Homework #1 due on Thursday How to measure half-lives document 2

3
Products in a Decay Chain 3

4
Solution: 4 If N B0 =0

5
Transient Equilibrium If parent T 1/2 >3-10 times daughter T 1/2 5

6
Example Radionuclide Generator Every time the “cow” is “milked” by running eluting solvent, activity of 99m Tc drops.

7
Secular Equilibrium If parent T 1/2 >> 10 times daughter T 1/2 7 It is useful to calculate the half-life of long- lived isotopes. For example for 238 U 238 U 234 Th 234 Pa and 234 Th T 1/2 =24.1d

8
No Equilibrium 8 If parent T 1/2 < daughter T 1/2 no equilibrium Parent decays Daughter increases then decays too

9
General Decay Chain – Bateman Equations 9 Two assumptions: 1. only parent at t=0. 2. no i ’s are equal

10
Branching Often observed in the odd-odd line of -stability 10

11
Growth of Radioactive Products in a Neutron Flux 11

12
Growth of Radioactive Products in a Neutron Flux 12 Notice saturation after 3-5 times T 1/2 radioactive product. Notice saturation after 3-5 times T 1/2 radioactive product. Additional irradiation time does not increase activity. Additional irradiation time does not increase activity.

13
13

Similar presentations

Presentation is loading. Please wait....

OK

Growth of Daughter Activities

Growth of Daughter Activities

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on pre ignition detonation Ppt on set top box Ppt on suspension type insulators of electricity Ppt on charge coupled device ppt Ppt on ms excel charts Ppt on chromosomes and genes are replicated Ppt on abo blood group system Ppt on formal education define Ppt on various types of pollution Download ppt on rag pickers