measuring/detecting radiation Flashcards
(11 cards)
what are two ways of measuring radiation?
- using a geiger-muller tube
- using photographic film
what specifically does the geiger-muller tube do?
detect nuclear radiation and how much radiation there is.
who discovered that photographic film could detect radiation? and when?
- Henri Becquerel
- 1896
how did Henri discover this?
uranium salts would darken photographic film.
why did the uranium salts darken the photographic film?
because radiation was being emitted by the nuclei in the uranium.
how is Henri’s discovery used in the nuclear industry?
worker will wear a film badge to determine if they’re being exposed to radiation.
what gas is found in the GM tube?
argon gas
why is there argon gas in the GM tube?
so that when radiation enters, the atoms of the argon are ionised and the electrons will move towards the thin wire.
what is the use of the thin wire in the GM tube?
it is connected to a voltage of +400v
what happens when the electrons move towards the thin wire?
more electrons will be produced from atoms.
how is the amount of radiation detected shown on the GM tube?
using the ratemeter/counter.
