zc\ Flashcards
(14 cards)
what is a alpha particle
a helium nucleas
what is a beta particle
fast moving electron
what is a gamma particle
high energy electromagnetic wave
what is ionisation
ionisation is the gain or loss of an electron to create an ion
in order most ionising particles
alpha beta gamma
can alpha pass through paper
no
can beta pass through 5mm of aluminium
no
can gamma pass through 5cm of lead
no but some get through
what is the equesion for absorbed dose
D=e/m
best defence for ionising radiation
distance and shielding
what are the uses for radiation in hospitals
destroying cancer cells radioactive tracers and sterilising medical equipment
what is nuclear fission
energy is released when a large atom is hit by a neutron and becomes unstable and splits into two or smaller pieces
what is a chain reaction
the neutrons produced by the reaction can then go on to further fission reactions
what is nuclear fusion
nuclear fusion is the process by which energy can be released when two smaller nuclei fuse together to form a large nucleus
