Place the radiation detector so it is ____ the source and less than ____ away. The count rate will include any alpha, ____ and gamma radiation that is ____ by the source. Now place a thin piece of ____ between the source and the radiation ____, if there is any ____ radiation being emitted, this will be absorbed by the paper and the count rate will ____. The count rate will now only include beta and ____ radiation. Remove the paper and replace it with the ____ sheet of aluminium. If there is any beta radiation being emitted, this will be ____ by the aluminium and the ____ rate will decrease. If radiation is still being detected, then this must be gamma, as it is the only type of radiation that can ____ the 3mm sheet of ____.

Investigating Radiation

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