History Of Coherent Scattering

Coherent Scattering is the idea of secondary radiation being released with no ionization of matter because of this is it also known as “unmodified scattering” (Curry III, 1990, p. 61). Coherent Scattering is the process of a low energy radiation as a photon exciting an electron and changing direction giving off low energy scatter radiation with the same wavelength, frequency and energy (Dufresne, personal communication, February 5, 2018). Coherent scattering has two different types Rayleigh scattering the effect of all electrons in an atom and Thomson scattering the effect of only one electron in an atom also known as classical scattering (Bushong, 2008, p. 163). Grenz radiation is soft radiation or a type of low energy radiation that is said

62) and explains why the sky looks blue. When you look up into the sky “… blue light travelling from the sun through the earth’s atmosphere (but not directly toward you) is scattered by the molecules toward your eye (Hamilton, 2012, p. 2). In order for blue light to appear in the sky is has to reflect off particles as scatter radiation. The most prevalent would be the nitrogen gas in the air. The blue color is scatted more than red. Rayleigh scattering occurs “when the scatter is considerably smaller than the wavelength of light” (Hamilton, 2012, p. 3). Scattering by particles that are smaller, or shorter than the wavelength of light will scatter more than wavelengths longer than light. Therefore, blue is more prevalent than red to scatter because blue color has a wavelength on average of 450 nm while red light has a wavelength of 650 nm. Finally, after all the blue has been scattered away from the sun onto the sky, what is left is a yellow color of the sun. The yellow color is not scattered because it has a longer wavelength and blue has a shorter wavelength than the radiation of light and thus was more likely to scatter. Rayleigh scattering is also affected by density and the atomic number. The denser a particle is the less scatter, the higher the atomic number the more electrons it will interact with thus less attenuation and scatter will

Grenz radiation is different from x-rays and gamma rays because “Grenz rays are produced at low kilovoltages giving them a very low penetration power” (Ngan, 2005, p. 1). According to Wikipedia (2017), grenz radiation is used to treat different skin conditions and only penetrates the skin at about 2mm using a kilovoltage range of 10 to 30 kV. The low penetration power of the Grenz rays helps to treat skin conditions such as psoriasis, acne, atopic dermatitis and eczema (Wikipedia 2017, p. 1 and Ngan, 2005, p. 1). Grenz radiation was discovered by “Gustov Bucky in 1923… he believed that the biological effects resembled those of UV light and traditional X-rays and hence were on the border between the two (Grenz = border in German)” (Wikipedia 2017, p. 1). Gustov Buck was a German-American Radiologist who came up with the Bucky grid to reduce scatter radiation to the x-ray image. The biological effects of grenz radiation are minimal with few side effects. A side effect of grenz radiation treatment may be a sunburn type of reaction. Treatments with grenz radiation are done under doctor supervision for 4 to 6 months and perhaps longer depending on what is being treated (Ngan, 2005, p.1). Coherent scattering is the “Interaction between very low energy, x-ray photons and matter” (Dufresne, personal communication, February 5, 2018). Grenz radiation participate in