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Wave Optics

Question
CBSEENPH12038755

Calculate binding energy per nucleon of Ca2040 nucleus.
(Given: mass of Ca2040 = 39.962589 u; mass of proton = 1.007825 u;  mass of neutron = 1.00865 u;   1 atomic unit (1u) = 931 MeV)

Solution

Given, Ca2040 contains 20 protons and (40-20) = 20 neutrons. 

Mass of 20 protons = 20 × 1.007825 = 20.1565 a.m.u
Mass of 20 neutrons  = 20 × 1.008665 = 20.1733 a.m.u 

Therefore, total mass of 40 nucleons = 40.3298 a.m.u

Given that mass of Ca2040 =  39.962589 a.m.u 

Therefore, mass defect,m = 40.3298 - 39.962589 = 0.367211 a.m.u 

Total binding energy per nucleon is given by, 

0.367211×931.540 = 8.55 MeV
 


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