Lecture 4

Nuclear Structure

• The Nuclear Force:
  a rich interaction
  nuclear energy levels: ¹²C
• Semi-Emiprical Mass Formula
• Liquid drop model
• Shell model
• Impications for solar abundances: plotted versus mass number and neutron number

Nuclear Decays

• alpha, beta, gamma
• paths on chart of the nuclides
• astrophysical example: line emission from nuclear decays
  • decay scheme
  • mapping preliminaries: Galactic space coordinates and longitude/latitude sky view
  • COMPTEL 1.8 MeV gamma-ray sky: the Galaxy contains freshly synthesized ²⁶Al!
  • INTEGRAL detection of ²⁶Al line shift across Galactic plane, and its likely interpretation
  • INTEGRAL detection of interstellar ⁶⁰Fe
  • possible supernova remnant detection in Antlia