radbio Flashcards
study of the effect of ionizing radiation on living organisms (physics & biology)
radiobiology
special type of radiation that includes x-rays
ionizing radiation
Any type of radiation that is capable of removing an orbital electron from atom with which it interacts
ionizing radiation
different types of ionizing radiation
alpha particle
beta
neutron
gamma
xray
removal of electron from atom
ionization
particulate form of ionizing radiation that consists of two protons and two neutrons
alpha particle
fast moving particles with negative electrical charge that are emitted from an atom’s nucleus during radioactive decay
beta
usually emitted as a result of spontaneous or induced nuclear fission
neutron
emission of an high-energy wave from nucleus of atom
gamma
emission of a high-energy wave from electron cloud of atom
xray
All of their energy is absorbed inside the body, potentially causing damage to the cells
alpha
travel farther in air than alpha particles, but can be stopped by a layer of clothing or by thin layer of substance
beta
able to travel hundreds or even thousands of meters in air, they are however able to be effectively stopped if blocked by hydrogen-rich material
neutron
unlike alpha or beta, does not consist of any particles, instead consisting of photon of energy being emitted from an unstable nucleus
gamma
Generally caused by energy changes in an electron such as moving from higher energy level to a lower one, causing the excess energy to be released
xray
2 sources of ionizing radiation
- natural environmental radiation
- man-made radiation
largest source of natural radiation
radon
largest source of man made radiation
diagnostic x-ray
annual dose of natural radiation
3 mSv
annual dose of man-made radiation
3.2 mSv
Radioactive gas that is produced by natural radioactive decay of uranium, which is present in trace quantities in Earth
radon
7 regions of electromagnetic spectrum
radiowave/radiofrequency
microwave
infrared
visible light
ultraviolet radiation
x-rays
gamma rays
longest wavelength with low energy
radiowave/radiofrequency
wavelength of radiowave
between 1 mm & 100 km