In this worksheet, we will practice relating the interactions of types of ionizing radiation to their absorption by thicknesses of different density materials.
Q1:
One half the -rays from a
sample are absorbed by a 0.170-mm-thick lead shielding layer. Half of the -rays that pass through the first layer of lead are absorbed in a second layer of equal thickness. What thickness of lead will absorb all but one in 1,000 of these -rays?
Q2:
A 2.00-cm-thick
sodium-iodide crystal absorbs all but
of rays from a radioactive source. What percentage of rays will not be absorbed by
4.00-cm thickness of the same material?
A
B
C
D
E
Q3:
What is the dose in millisieverts for a 0.1 Gy X-ray?
Q4:
A 2.50 cm
thick piece of lead can absorb of the rays from a radioactive source.
How many centimeters of lead are needed to absorb all but of the rays?
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