0751 - H122 - Basic Health Physics - 32 - Shielding Radiation.

Shielding Radiation

Alphas, Betas, Gammas and Neutrons

7/05/2011

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General General

Shielding Alpha Emitters Shielding Alpha Emitters

Shielding Beta Particles General Beta Particle Range Bremsstrahlung Example Calculation

Shielding Positrons

Shielding Positrons

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Shielding Gamma Rays

General

Basic Equation ? First Example Calculation

Basic Equation ? Second Example Calculation

Relaxation Length

Calculating the Required Shielding Thickness

Calculating the Required Shielding Thickness ? Example

Shielding Multiple Gamma Ray Energies

Shielding Multiple Gamma Ray Energies ? Example

Layered (Compound) Shielding

Layered (Compound) Shielding ? Example

Half Value Layers

Half Value layers ? Example

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Shielding Neutrons continued Multipurpose Materials for neutron Shields Possible Neutron Shield Options Neutron Shielding Calculations ? Fast Neutrons Neutron Shielding Calculations ? Alpha-Beryllium Sources Neutron Shielding Calculations

Gamma and Neutron Shields ? General General Radiation energy Shielding Material Shielding Material - Lead

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Shielding Gamma Rays continued Tenth Value layers Buildup Buildup Factor Buildup Factor Example Determining the Required shield Thickness with Buildup

Shielding Neutrons The Three Steps 1. Slow the Neutrons 2. Absorb the Neutrons 3. Absorb the Gamma rays

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