Gamma Deacy (cont.) and Nuclear Reactions (online class)

27 maio 2020, 10:00 • Elmar Biernat

Gamma Decay

• Angular momentum-parity selection rules; competing multipole emissions; isomeric transitions
• Internal conversion; electron energy spectrum; internal conversion coefficients; E0 transitions

Nuclear Reactions

• Types of reactions; classifications
• Observables and conservation laws
• Examples of nuclear reactions

(Literature: Chapter 11 in Introductory Nuclear Physics. K. S. Krane, Wiley 1987)

Beta Decay Selection Rules (cont.) and Gamma Decay (online class)

22 maio 2020, 11:00 • Elmar Biernat

Beta Decay

• Mirrow decays and non-mirrow decays
• Selection rules for forbidden decays
• ft values and degree of forbiddeness

Gamma Decay

• Kinematics
• RECAP: Classic em radiation, multipole moment, multipole radiation, angular distribution, parity, radiated power
• Quantum-mechanical multipole operators, decay constant for gamma emission, estimates for multipole operators
• Weisskopf estimates for electric and magnetic transitions, interpretations
• Selection rules: angular momentum, parity, magnetic and electric transitions

(Literature: Chapter 10 in Introductory Nuclear Physics. K. S. Krane, Wiley 1987)

Beta Decay (cont.) (online class)

15 maio 2020, 11:00 • Elmar Biernat

• Electron/positron momentum and energy distributions
• Fermi function and shape factor
• Experimental tests of Fermi's theory, Fermi-Kurie plots
• Comparative half lives, ft value
• Strength of weak nuclear interaction
• The fundamental weak interaction 
• Neutrino mass from beta spectrum, most recent estimates
• Allowed decays: Fermi and Gamow-Teller, selection rules
• Mixed decays, mixing in free neutron decay

(Literature: Chapter 9 in Introductory Nuclear Physics. K. S. Krane, Wiley 1987)

Quantum Theory of Radioactive Decay (cont.) and Beta Decay (online class)

13 maio 2020, 10:00 • Elmar Biernat

Quantum Theory of Decays

• Quasi-stationary states, decay law, width
• Derivation of Fermi's Golden Rule

(Literature: Chapter 6 in Introductory Nuclear Physics. K. S. Krane, Wiley 1987)

 Beta Decay

• Neutrinos
• Q values for negative and positive beta decays and electron capture
• Fermi's Golden Rule for negative and positive beta decay
• Number of final states

(Literature: Chapter 9 in Introductory Nuclear Physics. K. S. Krane, Wiley 1987)

Alpha Decay (cont.) and Quantum Theory of Radioactive Decay (online class)

8 maio 2020, 11:00 • Elmar Biernat

Alpha Decay

• Quantum mechanics recap: conservation of probability, probability flux
• Tunneling of alpha through rectangular barrier, transmissivity
• Gamow-Gurney-Condon-Theory: Tunneling of alpha through Coulomb barrier, Gamow factor, recover Geiger-Nuttall law, compare with data
  
• decays into other light nuclei

(Literature: Chapter 8 in Introductory Nuclear Physics. K. S. Krane, Wiley 1987)

Quantum Theory of Radioactive Decay

• Imaginary part in potential
  
• Quantum mechanics recap: stationary states