Why doesn't iron give off any energy when it is created through nuclear fusion?

Click For Summary
SUMMARY

The discussion centers on the phenomenon of iron's energy output during nuclear fusion in massive stars. When a star's core fuses into iron, specifically Iron-56, it fails to produce energy due to its high binding energy per nucleon, which is the largest among all elements. This lack of energy generation leads to the collapse of the star, as the iron core cannot support the star's weight. The mention of Nickel-58 highlights its proximity in binding energy, but Iron-56 is the primary focus.

PREREQUISITES
  • Nuclear fusion principles
  • Binding energy concepts
  • Stellar evolution knowledge
  • Understanding of isotopes, specifically Iron-56 and Nickel-58
NEXT STEPS
  • Research the process of nuclear fusion in massive stars
  • Study the concept of binding energy per nucleon in various elements
  • Explore the lifecycle of stars and the role of iron in stellar collapse
  • Investigate the properties and significance of isotopes like Iron-56 and Nickel-58
USEFUL FOR

Astronomers, astrophysicists, and students studying stellar physics will benefit from this discussion, particularly those interested in the processes of stellar evolution and nuclear fusion.

Forestman
Messages
212
Reaction score
2
I know from reading that when the core from a massive star is transformed into iron through the process of nuclear fusion that the star collapses because the newly formed iron core does not put out any energy to support the weight of the star. My question is, why is iron like this when it is created? Why does it not put out any energy?
 
Astronomy news on Phys.org
Because iron has the largest binding energy per nucleon
 
Thanks malawi_glenn.
 
Forestman said:
Thanks malawi_glenn.

Or, to be as specific as one can be, I think it is Ni-58 which has it, but Iron-56 is pretty close ;-)
 

Similar threads

  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 11 ·
Replies
11
Views
2K
Replies
2
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 21 ·
Replies
21
Views
3K
  • · Replies 7 ·
Replies
7
Views
5K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 5 ·
Replies
5
Views
13K
  • · Replies 1 ·
Replies
1
Views
2K