N21 Determining the Half-life of Thoron

Objective: To determine and investigate the half life of thoron

The decay process of radioactive materials can be described by an exponential law. The equation is:

Where £f is the decay constant for the individual nuclei.

N0 is the number of unstable nuclei at time t=0.

Every radioactive nucleus has a definite time interval T1/2. That is the half-life. It is the number of unstable nuclei decreasing to half of original number. After the T1/2 ,

the number of nuclei reduces half and half.

In the experiment, a thoron-air mixture is blown into an ionization chamber subject to a saturation voltage. Alpha-decay

. . .
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Approximate Word count = 536
Approximate Pages = 2 (250 words per page double spaced)