Posted: September 13th, 2017
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I have a lab report about an Xray. I’m working on it but I have some questions I need answers for them.
I will attach the questions that you need to answer.
X-ray Laboratory
Include answers to the following questions
Using the combo.jpg image (see below) and steps similar to those in the section above, determine the transmitted light intensity for the thickest steps of brass and aluminium step wedges, the lead sample and the thick and thin copper samples. Note that the background is not the same for each of these, so separate background readings will need to be taken.
(B) X-ray transmission changes due to different metal samples
The last section of Part A of this laboratory class investigates an x-ray film taken of a number of different metal samples (see photo given at the end of this document). In this section the theoretical changes in the x-ray transmission of these different samples will be calculated.
The x-ray attenuation coefficient of a material varies as a function of energy. Therefore the x-ray energy needs to be known in order to determine the level of attenuation. Assume x-rays of 70 kVphave been used. In general it is the mass attenuation coefficients of a material that are usually reported.
Use the attenuation coefficient data provided in the NIST database in subsequent calculations.
http://www.nist.gov/pml/data/xraycoef/index.cfm
Include an answer to the following
You will note that the NIST database doesn’t provide values for 70 keVx-rays,
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