— 05.09.2014 —
2.7.5 Example 5:
Measurement conditions:
Sample: Polyethylene; diameter 50 mm (2.0"), height 25 mm (1.0")
The sample is placed on different substrates
Use of maximum parameters/method for metallic samples
Use of a radiation protection sleeve that does NOT enclose the sample
completely
Measuring point 1
At the start
button or at
the hand of
the operator
(µSv/h)
2
Distance
10 cm (3.9")
(µSv/h)
3
30 cm (
distance
(µSv/h)
4
100 cm
(39.4")
distance
(µSv/h)
Steel sheet substrate 2.5
mm (0.1")
2 (<1) 75 (55) 15 (4) < 1(<1)
Aluminum sheet substrate
2 mm (0.08")
15 (3) 120 (70) 18 (6) < 1 (<1)
Without any substrate (e.g.
on the tabletop)
20 (3) 160 (80) 20 (7) 1.5 (1)
The values in brackets are the values for the method for the analysis of metallic samples.
The first values in the cells stand for the measurement with maximum parameters.
These values underline why - for the protection against radiation - the docking
station or the radiation protection shield should always be used for non-metallic
samples.
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