• Support PF! Buy your school textbooks, materials and every day products Here!

Energy of fission

1. Homework Statement

Find the energy which comes out with fission of the nucleus of deuterium and tritium, so we receive like product the nucleus of helium.

mass of tritium[tex]m(\stackrel{3}{1}H)=3,016049u[/tex]
mass of the nucleus of deuterium [tex]m(\stackrel{2}{1}H)=2,013553u[/tex]
mass of the nucleus of helium [tex]m(\stackrel{4}{2}He)=4,002603u[/tex]


2. Homework Equations

[tex]\Delta E=\Delta m c^2[/tex]

3. The Attempt at a Solution

The nuclear reaction

[tex]\stackrel{2}{1}H + \stackrel{3}{1}H \rightarrow \stackrel{4}{2}He + \stackrel{1}{0}n + energy[/tex]

How will I find the mass of triton( the nucleus of tritium) ?
 

Answers and Replies

Andrew Mason
Science Advisor
Homework Helper
7,539
317
How will I find the mass of triton( the nucleus of tritium) ?
Take the mass of the atom and subtract the mass of the electron. The binding energy of the electron is not enough to make a significant difference in the mass of the atom.

AM
 
(3,016049u+2,013553u)-(4,002603u+1,008665u)=0,018334

0,018334*931,494 MeV=17,078011 MeV

And in my text book results it is 17,8 MeV. Is their fault?
 
malawi_glenn
Science Advisor
Homework Helper
4,782
22
The answer should be 17.6MeV, this is well known reaction to me.

And you will obtain that answer if you use [tex]m(\stackrel{2}{1}H)=2,014101783u[/tex]

Edit, link:
http://www.nndc.bnl.gov/amdc/masstables/Ame2003/mass.mas03 [Broken]
 
Last edited by a moderator:

Related Threads for: Energy of fission

Replies
15
Views
545
  • Last Post
Replies
2
Views
908
  • Last Post
Replies
3
Views
12K
Replies
2
Views
710
  • Last Post
Replies
2
Views
4K
Replies
1
Views
12K
Replies
5
Views
740
Replies
3
Views
1K
Top