University of Lagos, Nigeria , PHS 204, Modern Physics

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Title:

PHS 204, Modern Physics

Institution:

University of Lagos, Nigeria

Level:

Degree.

Description:

The Discreteness of Electronic Charge: Discovery of the electron in cathode rays. Properties of the cathode rays. Determination of specific charge (e/m) of the electrois: Thomson's experiment on electrons in cross waxial electric and magnetic fields. Determination of the electronic charge (e): the Millikan's experiment. Physical significance of Thomson's and Millikan's results.

The Atomic Mass Spectrographs: Isotopes and Isotope-separations. The atomic mass. Mass spectrographs-basic principles. Mass
spectrometers: construction and modes of operation. The Aston's mass spectrographs, the Dempster's mass spectrographs and the Bainbridge mass spectrographs. The doublet method in mass spectroscopy.
Atomic Models: The Thomson's model and limitations of the model. The Rutherford's model and limitations of the model. The Bohr's model and Bohr-Sommerfeld theory: quantisation postulate for circular and multiply-periodic motions. The quantum numbers. Paulis exclusion principle. The periodic classification of elements. The Hydrogen atom: Stationary States and Rydberg's law. The energy levels and hydrogen spectrum. The moseleyi law and normal - Zeeman effects.
The Nuclear Structure: Nuclear nomenclature. Nuclear energy units. The mass defect, packing fraction, binding energy and binding fraction. Variation of binding fraction with mass number and the separation energy. Nuclear stability. Natural radioactivity: discovery and properties of Becquerel rays (emanations from radio isotopes). Radioactive series, radioactivity law and the half-life. Applications of radioisotopes. Rutherford's & particle scattering, experimental set up, theory and interpretation of results.
Quaditative' ideas of nuclear forces.

Particle Accelerators: Need for the accelerators. Types of accelerators: Direct voltage accelerators (electron tube, Cockroft- Walton accelerators, van der Graaff accelerators, Tandem accelerators, Linear accelerators). The Cyclic accelerators: (Cyclotum, Betatron). The principle of Phase Stability. The Synctro machines. (Priton synctrotron, synchrocyclitons, microtrons or consmotroni).
Quantitative ideas only and performance assessment of the machines.
Detection of Nuclear Radiations: Basic principles of radiation detection. Construction and operations of Gass filled detectors (Ionisation chamber, the properturial detector, and accessory equipments). Qualitative description of visual detectors (expansion chambers, diffusion closed chamber, the Bubble chamber and the nuclear emulsion detectors. The Electron multiplier and detectors
scintillation.

Interaction of Nuclear Radiation with Matter: General principles, energy loss by charged particles. The Range - Energy relationship. Interaction of Gamma radiations with matter: Attenuation,
photoelectric effects, Anger effects, the Compton effects, Pair production.

Assessment is by assignments and examination.

Programmes for which this course is required or in which it can be included:
Bachelor of Science Honours in Education/Chemistry
Bachelor of Science Honours in Education/Physics.

Languages:

English

Media and methods employed: Printed text, tV broadcast, radio broadcasts, face-to-face tutorials.

Printed correspondence texts prepared by institution, face-to-face tuition, radio, television via cable.

Administrative information:

This course is equivalent to 2 hours of instruction per week. It is a 1 semester course (15 weeks) and awards 2 units.

Classification:

070430 PHYSICS

Date:

01 September 1992 bb
Source: COSIT Brochure

[About the Institution][Courses][Programmes]

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