binding energy
TRANSCRIPT
BINDING ENERGY
Presented by:
Ahmed Nawaz
Assigned By: Prof. Dr. Aziza Aftab
ContentsBinding Energy
Mass Defect
Example of Binding energy & Mass Defect
Binding EnergyBinding energy is the energy required to disassemble or break a whole system into separate parts.
Nuclear binding energy is the energy that would be required to disassemble or break the nucleus of an atom into its component parts. These component parts are neutrons and protons, which are collectively called nucleons.
The mass of an atomic nucleus is usually less than the sum of the individual masses of the constituent protons and neutrons (according to Einstein's equation E=mc2) and this 'missing mass' is known as the mass defect, and represents the energy that was released when the nucleus was formed.
Mass defect
Keep this in
1 atomic mass unit
= 1µ= 931 MeV
mp = 1.0073µmn = 1.0087µ
Alpha Decay of Uranium
U92232 → Th90
228 + He24
reactant product
Mass reactant= 232.0371
46amu
Mass product= 228.028731 +
4.002603= 232.031334
amu
STEP 1:
Difference between mass of reactant and mass of
products
STEP 2:
∆ M= mass of reactant − mass of products - 232.031334 amu
∆ M=0.005812 amuMass defect
Convert mass defect into energy
STEP 3:
E = m ass defect ( c2 )E = 0.005812 amu (931 MeV / amu )
E = 5.4 MeVBinding Energy
Fission of Uranium
n01 + U92
235 → Ba56138 + Kr36
95 + 3 n01
reactants products
Mass reactant= 235.0439 amu + 1.0087 amu = 236.0526
amu
Mass product= 137.905 + 94.900 +
3.026= 235.831 amu
STEP 1:
Difference between mass of reactants and mass of
products
STEP 2:
∆ M= mass of reactants − mass of products236.0526 amu - 235.831
amu∆ M= 0.222 amuMass defect
Convert mass defect into energy
STEP 3:
E = m ass defect ( c2 )E =0.22 2 amu (931 MeV / amu )E = 206 MeV
Binding Energy
Binding Energy: Compared
Alpha decay 5.4 MeV
Fission206 MeV
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