Absorption coefficient of Aluminum with β-rays
Purpose: -
Study β-ray absorption by aluminum absorber and determine the amount of weight loss.
Apparatus: -
GM Tube, GM counter, Radioactive (Beta source)
Theory: -
equilibrium measurement of the rate of radiation loss as it passes through a given object or a fraction of the eventful radiant energy absorbed by each unit or the thickness of the eraser.
Process: -
1. Adjust the Aluminum absorber by increasing the size.
2. To maintain a constant operating voltage (450V), find the background calculation.
3. Place the source β in the source holder next to the detector window.
4. Place an aluminum absorber with a minimum value for each area between the source and the detector in the repair area. Note the 30-second count.
5. Repeat the test of 30 different samples for each growing area used. And a decrease in order. Calculate the value of the scale and therefore the correct calculation (N).
6. Plan a graph plan
7. The slope of the graph is the size -ve but the absorbent coefficient µ is the maximum.
Tabular column:-
Note: -
1. Sourced used ________ (e.g.
2. Operating Capacity (Vo) ________V volumes
3. The background count is 30 seconds. b
4. Mean
Calculation: -
Slope = AB / BC _______
A1-absorber absorption equilibrium µ = -2.303 (slope) = _______ cm
Nature of Graph:-
Results: -
The absorption coefficient of A1-absorber is µ = ___ cm2 / mg
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