Cloud Chambers
Cloud Chamber is used to detect the tracks of the radiations. The tracks produced are in white colour. A cloud chamber is basically a plastic box which consists of two compartments. Dry ice is first put in the lower compartment to cool the lower region of the upper compartment.
Then the felt ring around the rim of the chamber is soaked with alcohol. When the alcohol vapour diffuses to the lower region of the upper compartment, it is cooled and ready to condense.
A layer of supersaturated vapour is formed at the lower region. A radioactive source is often placed in this region. When a radiation is emitted, it ionises the air molecules along its path, which provides a chance for the alcohol vapour to condense readily on the ions and forms white tracks in the chamber.
Each track shown in the chamber corresponds to the path of a radiation and the shape of the tracks characterises different types of radiations.
RADIOACTIVITY-NUCLEAR (Detectors of Radioactive Emissions)
Posts
No comments:
Post a Comment