Karteikarten
Nuclear radiation
Karten in diesem Stapel (12)
- 1What is the absorption properties of Alpha radiation?Highly ionising therefor easily absorbed by air and thin paper
- 2What is the absorption properties of Beta radiation?Quite ionising so absorbed by about 3mm of aluminium
- 3What is the absorption properties of Gamma radiation?Very weakly ionising so absorbed by many cm of lead or concrete
- 4What do particle detectors depend on?The ability of particles to cause ionisation
- 5What is an example of an early particle detectors?Cloud chambers
- 6How do cloud chambers work?Ethanol vapor is saturated so it readily condenses especially when cooled
Ions created by radioactive particles provide ideal sites for condensation to begin
The tracks formed are lines of liquid droplets - 7In a cloud chamber what is the appearance of the tracks of an alpha particle?Straight-
showing they are massive enough not to be easily deflected
Thick-
Showing they are powerful ionisers
Fixed lengths-
Showing alphas are emitted from a source containing certain amounts of energy - 8In a cloud chamber what is the appearance of the tracks of a Beta particle?Many changes in direction-
Beta particles are very light and easily deflected
Thin-
Not strong ionisers
Different lengths-
Beta particles are emitted with a range of energies - 9In a cloud chamber what is the appearance of the tracks of Gamma radiation?Gamma rays cause little ionisation and so are not easily detected by cloud chambers
- 10How do bubble chambers work?Liquid hydrogen is kept under pressure to stop it evaporating
When pressure is released any ions formed by particles provide ideal sites for gas bubbles to form
As the particles are passing through liquid hydrogen not air they are slowed down - 11Why are bubble chambers ideal?Allow you to investigate very short lived particles which decay soon after being created and the products of collisions between particles
- 12What are some sources of background radiation?Cosmic radiation
Grounds and buildings
Man made radiation
Living things
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- Beschreibung
- Physics unit 5 Karteikarten am Nuclear radiation, erstellt von sammy414 am 12/02/2014.
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- sammy414
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