Binding energy and semi-empirical mass formula, nuclear stability, nuclear forces, ground state of deuteron, alpha decay, beta decay, Fermi theory and selection rules - Question Bank
1. The ground state of the deuteron is predominantly an S-wave (l=0) state, with a small admixture of D-wave (l=2) due to:
2. The concept of 'saturation' in nuclear forces means that:
3. The stability of a nucleus is primarily determined by:
4. Which type of decay is characterized by the emission of a particle with zero rest mass and zero charge?
5. The spin-orbit coupling term is important in which nuclear model?
6. The process where a nucleus transforms into an isomer of the same nuclide with a different energy state is called:
7. Which term in the SEMF becomes more significant as the number of protons increases?
8. The range of the nuclear force is limited because:
9. Electron capture results in the emission of:
10. In alpha decay, the emitted alpha particle carries away:
11. What is the parity of the ground state of the deuteron?
12. The Fermi's Golden Rule is often applied in the Fermi theory of beta decay to calculate:
13. A nucleus is considered unstable if it lies outside the valley of stability. Such nuclei may undergo transformations to reach stability via:
14. The Coulomb term in the SEMF is approximately proportional to:
15. Which component of the SEMF is proportional to A^(2/3), reflecting the surface area of a nucleus?
16. The shell model of the nucleus is analogous to:
17. The liquid drop model of the nucleus provides a basis for understanding:
18. Nuclei with 'magic numbers' of both protons and neutrons are known as:
19. The 'magic numbers' (e.g., 2, 8, 20, 28, 50, 82, 126) in nuclear physics refer to:
20. Beta decay selection rules are more complex than gamma decay because:
21. For gamma decay, the relevant selection rule often involves the change in:
22. Selection rules in nuclear physics dictate:
23. In the context of beta decay, the neutrino (or antineutrino) is emitted to conserve:
24. The Fermi theory of beta decay explains:
25. Beta decay is a mechanism for nuclei to adjust their neutron-to-proton ratio to approach stability by:
26. Alpha decay is more common in nuclei that have:
27. What is the primary reason for the existence of a 'valley of stability' on a plot of neutron number vs. proton number?
28. Why is the binding energy of the deuteron relatively low compared to heavier nuclei?
29. The ground state of the deuteron is a spin-1 state, indicating:
30. The short-range nature of the strong nuclear force is often described by its:
31. What is a characteristic feature of the strong nuclear force?
32. In electron capture, a nucleus:
33. Nuclei with a binding energy per nucleon significantly higher than iron tend to undergo:
34. Nuclei with a binding energy per nucleon significantly lower than iron tend to undergo:
35. The binding energy per nucleon is generally highest for nuclei around:
36. What does the pairing term in the SEMF account for?
37. The asymmetry term in the SEMF arises from the fact that:
38. The Coulomb term in the SEMF reflects the:
39. The surface term in the SEMF represents the reduction in binding energy due to:
40. Which term in the SEMF accounts for the fact that nucleons are attracted to their nearest neighbors, but not distant ones?
41. The semi-empirical mass formula (SEMF) is used to approximate:
42. What is the role of the weak nuclear force in beta decay?
43. In beta-plus (β+) decay, what transformation occurs within the nucleus?
44. What is the main characteristic of beta-minus (β-) decay?
45. In alpha decay, an atomic nucleus:
46. The ground state of the deuteron (a nucleus of deuterium) consists of:
47. What is the primary force responsible for holding nucleons together in a nucleus?
48. Which of the following statements best describes nuclear stability?
49. What is binding energy in the context of a nucleus?