2. Using the shell model, deduce the ground state and first excitations of the following nuclei: 1°0, 4°Ca, 103Sn and 211Pb. Explain in detail some limitations of the shell model.
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- Explain the structure of the atom in general.Question 30 Which of the following is true about the Klein-Gordon equation? O The Klein-Gordon equation is the relativistic generalization of the Schrodinger equation. O The Klein-Gordon equation applies to spin-zero particle. O The Klein-Gordon equation correctly predicts the spin of the electron. O The Klein-Gordon equation gives the correct energy levels in hydrogen.Ggg
- 14:56 Sun 19 May 2 of 8 SECTION A qmplus.qmul.ac.uk Answer ALL questions in Section A Expect to use about half a page for each section A solution. Question A1 Give the term used in condensed matter physics for each of the following: a) The centre of the Brillouin zone [1 mark] b) A method for generating a neutron beam by bombarding a heavy metal target with protons [1 mark] c) The group of atoms associated with each lattice point in a crystal structure d) The Fourier transform of the lattice of a crystal [1 mark] [1 mark] e) A vibrational mode whose frequency tends to zero as the wavevector approaches zero [1 mark] f) A model of electronic structure in which electrons move in a weak, periodic potential and do not interact with each other by the Coulomb force [1 mark] Question A2 The body-centred cubic structure is common among metals. a) How many nearest neighbours has each atom in this structure? Give the nearest-neighbour distance in terms of the unit cell parameter a. [2 marks] b)…3. (a) Apply L-S coupling according to the Nuclear Shell model to explain the occurrence of magic number 28. (b) Draw the sketch of the appropriate energy level diagram before and after the spin-orbit coupling phenomenon. 4. "Everything is radioactive", explain the statement using appropriate examples and the origin of the radioactivity in your own words.Prove using the uncertainty principle that an electron cannot exist inside a nucleus.