Products and energy from Iron 56 fission

Click For Summary

Discussion Overview

The discussion centers around the theoretical aspects of fission of iron-56, including the potential products, energy release, and radiation implications. Participants explore the complexities of fission methods and the energy dynamics involved in splitting iron-56.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant notes that iron-56 is not a good fission candidate, requiring more energy to split than what could be obtained.
  • Another participant mentions that fission can yield various products, some of which may be radioactive, and that the energy involved depends on the fission method and products.
  • A participant clarifies they are interested in the absolute energy release from splitting iron-56, rather than the net energy, which is likely negative.
  • Discussion includes the need to identify the most likely fission methods for iron-56, with uncertainty expressed about available methods.
  • Another participant calculates an upper limit for energy release when splitting iron-56 into specific daughter nuclei, suggesting a value of 19.93 MeV, while noting that other fission reactions might require less energy.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specifics of fission products or methods, and multiple competing views regarding energy dynamics and fission characteristics remain present.

Contextual Notes

Limitations include a lack of consensus on the fission methods available for iron-56 and the uncertainty surrounding the energy dynamics involved in the fission process.

jerich1000
Messages
55
Reaction score
0
I know the iron-56 nucleus is not a good fission candidate, and that more energy is required to split iron-56 than what is required to split it.

But theoretically, if one were to split iron-56, what would be the products and what would be the energy obtained per unit mass?

Would there be harmful (e.g., beta emission or other) radiation? I realize that a runaway chain reaction is not possible.

Thanks
 
Engineering news on Phys.org
Fission can lead to many different results. Some of them would be radioactive, some of them would not.
and what would be the energy obtained per unit mass?
The energy required? Depends on the fission method and products.
 
I'm not asking for the "net" energy obtained from splitting iron-56, as it probably is negative. I'm asking what the absolute energy release would be after splitting iron-56.

Perhaps I should ask, "what energy is required to split iron-56?", given that it's the same or more than what is obtained from splitting it.

"MFB" asked about the fission method. I don't know what the available fission methods are. What about least complex or most likely method?

Thanks
 
I'm asking what the absolute energy release would be after splitting iron-56.
The released energy is the incoming energy (if you shoot with protons, neutrons, photons, electrons or whatever) minus the energy loss from fission.
I have no idea what the most likely fission products are, and it will depend on the beam you use to induce fission, too.

56Fe has 26 protons and 30 neutrons and a mass of 55.9349375(7) u.
Possible daughter nuclei include 26Mg (12 protons, 14 neutrons, mass 25.982592929(30) u) and 30Si (14 protons, 16 neutrons, mass 29.97377017(3) u).
55.9349375-25.982592929-29.97377017 gives 19.93 MeV to split iron into those nuclei. This is an upper limit, other fission reactions might need less energy.
 

Similar threads

  • · Replies 29 ·
Replies
29
Views
3K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 15 ·
Replies
15
Views
4K
  • · Replies 24 ·
Replies
24
Views
4K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
1
Views
3K
Replies
1
Views
2K
  • · Replies 0 ·
Replies
0
Views
1K
  • · Replies 16 ·
Replies
16
Views
4K
  • · Replies 2 ·
Replies
2
Views
2K