Instructions

This python3 program downloads X-ray Mass Attenuation Coefficients from the NIST database and saves them in a nice readable .csv file.

downloadNIST.py is more user friendly while adownloadNIST.py is more suitable for a larger amount of tables.

downloadNIST.py

• Execute using "python3 downloadNIST.py" / "chmod +x downloadNIST.py && ./downloadNIST.py"
• Follow instructions
• Table will be saved in the same folder as you are in.

adownloadNIST.py

• Execute "python3 adownloadNIST.py X" / "chmod +x adownloadNIST.py && ./adownloadNIST.py X" where X is the element name.
• Csv data will be printed to the terminal.
• Optionally you can pipe the data into a file or pipe it into other programs like sed (example: "python3 adownloadNIST.py Tb > path/to/file.csv")