Radioactivity (5 experiments)
Assignment
Tasks for secondary school students
- Become acquainted with basic ways of protection against ionizing radiation.
- Think about statistical processing in experiments A – C. Learn about meaning of arithmetic mean and corrected sample standard deviation.
- Mesure especially experiment C in remote laboratory: Measure dependency of number of pulses on
thickness of shielding material at least three times for every thickness in interval 0–2,5 mm.
Experiment B is voluntary for interested students. Experiment A is partially contained in C – see following task. - Don't forget to correct measured data - this means to substract measured data of natural radioactive background.
- Fit all measured and corrected data with expected function (exponential function).
(This can be done eg. in MS Excel with tool trendline.) - Write protocol from measurement, discuss in conclusion how measurement is consistent with theoretical law. Discuss efficiency of shielding against ionizing radiation.
Don't forget to close window with control of remote experiment when you don't measure (so you don't block other visitors).
Time of measurement is in case of queue limited to 10 minut per user!
| Method | A. Monitoring of the natural background radiation | B. Protection against ionizing radiation by longer distance from a radioactive source | C. Protection against ionizing radiation by shielding |
|---|---|---|---|
| I) | Instructions to experiment | ||
| II) | Run experiment | Run experiment | Run experiment |
| Run interface for data download | |||
| III) |
Instructions how to process experiment
Template for protocol – UK MFF Physics for non-physics |
||
(Template for protocol isn't available for this experiment. You can run experiment – control measuring aparature and record of measured data. In case of queue it is only possible to run interface for downloading data and to get real data from the non-stop automatic long-term measurement, that is arbitrarily large statistical set.)