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categoryفيزياء schoolبكالوريوس event_available2026-07-13

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3-Examine carefully the Sn and Sp values given in Table 3.1 and draw conclusions about the strength of the binding of the last proton or neutron in the mirror pairs (170, 17F) and (4¹Ca, 41Sc). Try to account for general or systematic behavior. Compare the nucleon separation energies in nuclei with identical numbers of protons or neutrons (for example, Sn in 160 and 17F or Sp in 160 and 170). Extend these systematics by evaluating and tabulatingthe Sn and Sp for He, He, "Li and for 56Ni, 57Ni, and 57Cu. (Note: Nuclei with Z or N equal to 2, 8, 20, or 28 have unusual stability. We explore thereasons for this behavior in Chapter 5.) Table 3.1 Some Mass Defects and Separation Energies Nuclide A (MeV) S₁ (MeV) Sp (MeV) 160 -4.737 15.66 12.13 170 -0.810 4.14 13.78 17 F +1.952 16.81 0.60 40 Ca -34.847 15.64 8.33 41 Ca -35.138 8.36 8.89 41 Sc -28.644 16.19 1.09 208 Pb -21.759 7.37 8.01 209 Pb -17.624 3.94 8.15 209 Bi -18.268 7.46 3.80

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