COMPTON SCATTERING PROCESS BASIC INFORMATION AND TUTORIALS FOR CHEMISTRY

WHAT IS COMPTON SCATTERING PROCESS?

Compton Scattering Process What You Need To Know About It

Compton Scattering Process: In a Compton scattering process, a g radiation with somewhat higher energy interacts with an outer shell electron of the absorber atom transferring only part of its energy to the electron and ejecting it.

The ejected electron is called the Compton electron and carries a part of the g-ray energy minus its binding energy in the shell, i.e., E¢g - EB, where E¢g is the partial energy of the original g ray.The remaining energy of the g ray will appear as a scattered photon.

Thus, in Compton scattering, a scattered photon and a Compton electron are produced.The scattered photon may again encounter a photoelectric process or another Compton scattering process, or leave the absorber without interaction.

As the energy of the g radiation increases, the photoelectric process decreases and the Compton scattering process increases, but the latter also decreases with photon energy above 1.0MeV or so.The probability of Compton scattering is independent of the atomic number Z of the absorber.

The Compton scattering process in which a g ray transfers only a part of its energy to an electron in a shell and is itself scattered with reduced energy. The electron is ejected from the shell with energy,E g - EB, where E¢g is the partial energy transferred by the g ray and EB is the binding energy of the electron in the shell.

The remaining g-ray energy appears as a scattered photon.

RESPIRATORY FIBROGEN BASIC INFORMATION AND TUTORIALS

BASIC INFORMATION ON RESPIRATORY FIBROGEN

What are Respiratory fibrogens?

The hazard of particulate matter is influenced by the toxicity and size and morphology of the particle. Figure below gives typical particle size ranges for particles from various sources.

The critical size of dust (and aerosol) particles is 0.5 to 7 μm, since these can become deposited in the respiratory bronchioles and alveoli.

If dust particles of specific chemicals, e.g. silica or the various grades of asbestos, are not cleared from the lungs then, over a period, scar tissue (collagen) may build up; this reduces the elasticity of the lungs and impairs breathing.

The characteristic disease is classified as pneumoconiosis. Common examples are silicosis, asbestosis, coal pneumoconiosis and talc pneumoconiosis.

An appreciation of the composition and morphology of the dust is important in the assessment of hazard.

Thus, among silica-containing compounds, crystalline silicates and amorphous silicas (silicon dioxide) are generally not considered fibrogenic, whereas free crystalline silica and certain fibrous silicates such as asbestos and talcs can cause disabling lung diseases.