How Much Energy Is Needed to Separate Nucleons in a Gold-197 Nucleus?

Click For Summary
SUMMARY

The energy required to completely separate the nucleons in a gold-197 nucleus is calculated using the formula E = 196.96654 u x 931.5 MeV/u, resulting in approximately 183,000 MeV. The gold-197 nucleus contains 197 nucleons, not 196.96654. To find the binding energy, one must use the equation Eb = [m(nucleons) - m(nucleus)]c^2, ensuring to account for the mass of electrons when determining the mass of the nucleus. The binding energy per nucleon can also be derived from this calculation.

PREREQUISITES
  • Understanding of nuclear physics concepts, specifically binding energy.
  • Familiarity with atomic mass units (u) and their conversion to energy (MeV).
  • Knowledge of the relationship between mass and energy (E=mc²).
  • Basic skills in performing unit conversions and calculations involving nucleons.
NEXT STEPS
  • Research the concept of binding energy per nucleon in various isotopes.
  • Learn about the significance of atomic mass units in nuclear physics.
  • Explore the calculation of binding energy using different isotopes and their respective nucleon counts.
  • Study the effects of electron mass on atomic mass and its implications for nuclear calculations.
USEFUL FOR

Students studying nuclear physics, educators teaching atomic structure, and researchers interested in nuclear binding energy calculations.

matt72lsu
Messages
94
Reaction score
0

Homework Statement


The atomic mass of gold-197 is 196.96654 u.

How much energy is required to completely separate the nucleons in a gold-197 nucleus?

Homework Equations



E = 196.96654 u x 931.5

The Attempt at a Solution


I did the above calculation and got 1.83e5 MeV but I am pretty sure I did this completely wrong. help?
 
Physics news on Phys.org


Does gold-197 have 196.96654 nucleons? How many does it really have?
 


To separate the nucleons completely, you must supply the binding energy of the nucleus:

Eb = [m(nucleons) - m(nucleus)]c^2 (Note that mass is in kg).

Alternatively, use 931.5MeV / u to simplify the calculation (and use only atomic mass units):

Eb = [m(nucleons) - m(nucleus)] x 931.5 MeV/u

If the binding energy is Eb, what is the binding energy per nucleon?Also, remember that the atomic mass includes electrons, so you will have to subtract the mass of these in order to obtain the mass of the nucleus only.

BTW, I think you did the calculation to find the mass-energy of the gold atom, rather than the energy required to separate its nucleons.
 
Last edited:

Similar threads

  • · Replies 10 ·
Replies
10
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 16 ·
Replies
16
Views
2K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 16 ·
Replies
16
Views
3K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 4 ·
Replies
4
Views
3K
Replies
9
Views
6K
  • · Replies 17 ·
Replies
17
Views
15K