AUGUST 2017 Sub. Code: 2103
B.Sc. NUCLEAR MEDICINE TECHNOLOGY
FIRST YEAR
PAPER III BASIC PHYSICS AND NUCLEAR PHYSICS
Q.P. Code: 802103
Time: Three Hours Maximum: 100 Marks
Answer all questions
I. Elaborate on: x 10 30)
1. Define physical, biological and effective half-life of a radioactive substance.
Derive the equation of effective Half-life.
2. What are the subatomic particles? Describe each one in detail.
3. Define radioactive decay. Compare the properties of alpha, beta and gamma rays.
II. Write notes on: x 5 40)
1. Derive the equation for radioactive decay A Aoe(-λt).
2. What is meant by isotopes and radio nuclides? Give examples.
3. Explain the phenomena of Fluorescence and phosphorescence.
4. Difference between Gamma rays and X-rays.
5. The exposure rate from a radioactive material at 1 meter distance is 100 mR/hr.
What will be the exposure rate at a distance of 2 meter 0.5 meter.
6. Binding forces between Nucleons.
7. Structure of atom.
8. Electrostatic forces.
III. Short answers on: (10 x 3 30)
1. Inverse square law.
2. Units of voltage, electric current and resistance.
3. Pair production.
4. Mass attenuation coefficient.
5. Shielding material for β radiation.
6. Ionization and excitation.
7. Tenth value layer.
8. Electromagnetic radiation.
9. State Coulomb's law.
10. What is isomeric transition? Give one example.