mass absorption coefficient of aluminium

Smythe

I was conducting an experiment, and we had to use a radioactive source and a Geigor counter, in conjunction with aluminium plates.

Using the data we produced we had to graph an absorption curve and obtain a value for the mass absorption coefficient of aluminium.

Then we had to compare this value with the accepted value for the mass absorption coefficient of aluminium.

Would anyone here know what the accepted value is, as I can't seem to locate it on Google, or anywhere else.

Thank you.

rgunning

NIST should be a good enough bet:

http://physics.nist.gov/PhysRefData/XrayMassCoef/ElemTab/z13.html

You need to know the energy of the beam (I guess gamma-rays for this expt). You can find that out by knowing what the radioactive source is.

Smythe

Thank you rgunning.

rgunning wrote: »

NIST should be a good enough bet:

http://physics.nist.gov/PhysRefData/XrayMassCoef/ElemTab/z13.html

You need to know the energy of the beam (I guess gamma-rays for this expt). You can find that out by knowing what the radioactive source is.

Yes, gamma.

It was a 5uCi Sr90 source.

FarmerGreen

rgunning wrote: »

NIST should be a good enough bet:

http://physics.nist.gov/PhysRefData/XrayMassCoef/ElemTab/z13.html

You need to know the energy of the beam (I guess gamma-rays for this expt). You can find that out by knowing what the radioactive source is.

Interesting graph, fancy a Gamma ray laser?