Atomic Structure - Physics

what are the 4 types of radio active decay
alpha, beta, gamma, neutron
1 of 10
what is an alpha particle
an alpha particle is a helium nucleus
2 of 10
what is a beta particle
a beta particle is a fast moving electron which is emitted from the nucleus
3 of 10
what is gamma decay
Gamma rays are short wave-lengths, with high frequency electromagnetic waves
4 of 10
what is activity measured in
Becquerels (Bq)
5 of 10
what is the equation for finding the count rate of a radioactive source from a GM tube
corrected count rate = total count rate - background count rate
6 of 10
what is the half-life of an isotope
the half-life of an isotope is the time it takes for the number of nuclei ina sample to halve
7 of 10
what does it mean if an object is said to be contaminated
an object is said to be contaminated if it contains radioactvie nuclei which will go on to decay and release ionising radiation
8 of 10
what does irradiation mean
it is the process of exposing an object to ionising radiation
9 of 10
what steps should be taken to minimise levels of radiation
mimimise time exposure, maximise distance from source use appropriate absorbents
10 of 10

Other cards in this set

Card 2

Front

what is an alpha particle

Back

an alpha particle is a helium nucleus

Card 3

Front

what is a beta particle

Back

Preview of the front of card 3

Card 4

Front

what is gamma decay

Back

Preview of the front of card 4

Card 5

Front

what is activity measured in

Back

Preview of the front of card 5
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