University Experiment
Half-life and radioactive equilibrium with Cobra SMARTsense
Article No: P2520167
The half-life of a Ba-137 m daughter substance eluted (washed) out of a Ca-137 isotope generator is measured directly and is also determined from the increase in activity after elution. Tasks To record the counting rate as a function of the counter tube voltage (counter tube characteristic) when the isotope generator activity is constant (radioactive equilibrium). To measure the activity of the isotope generator as a function of time immediately after elution. To measure the activity of a freshly eluted solution of Ba-137 m as a function of time. Learning objectives Parent substance Daughter substance Rate of decay Disintegration or decay constant Counting rate Half life Disintegration product