Introduction To Chemistry I
Introduction To Chemistry I CHM 12500
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This 1 page Class Notes was uploaded by Austen Pollich on Saturday September 19, 2015. The Class Notes belongs to CHM 12500 at Purdue University taught by Staff in Fall. Since its upload, it has received 18 views. For similar materials see /class/207975/chm-12500-purdue-university in Chemistry at Purdue University.
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Date Created: 09/19/15
Assessing Potential Biological Damage from Radiation Radioactive nuclides are sources of highenergy particles andor photons This radiation can break chemical bonds and ionize molecules In order to assess the potential for biological damage from a particular source of radiation the following characteristics need to be considered N E 4 V39 Energy of radiation 0 results from gt kinetic energy of particles and dosage 0 measured in rads radiation absorbed dose 0 l rad l x 10392 J deposited per kg tissue Penetrating ability results from gt particle charge uncharged particles eg y rays and neutrons have greater penetrating ability than charged particles eg or and W also affected by the kinetic energies of the particles low energy 0L stopped by dead layer of skin external exposure low energy and 5 penetrate about 1 cm external exposure y rays and neutrons extremely penetrating Ionizing ability 0 results from gt particle mass 0 0L gt neutron gt 34 gt 7 Chemical properties results from gt periodic trends 0 damage from an ingestedinhaled radioactive nuclide depends on its residence time eg strontium90 versus krypton85 both emitters strontium90 would be expected to have a much longer residence time in the body because it is chemically similar to calcium krypton85 is an inert gas External vs internal exposure