Recent content by kmoh111

You can find mass attenuation coefficients at: http://physics.nist.gov/PhysRefData/XrayMassCoef/tab3.html

Homework Statement I'm working a homework problem that states: A very old specimen of wood contained 1012 atoms of 14C in 1986. • How many 14C atoms did it contain in the year 9474 B.C.? • How many 14C atoms did it contain in 1986 B.C.? Homework Equations N(t) =...

Homework Statement I am working a homework problem that is trying to find the mean radius, \bar{r} from the midpoint of a cylinder. The problem states: What is the mean radius, \bar{r} from the midpoint of a cylinder of radius a and height h to its boundary surface? Evalute mean radius...

This thread can be disregarded. I was able to solve the problem. The solution to this problem is to use exponential attenuation: N = N(0) exp(-uL). The approach is to solve for L for given u and u(en) values when 99% of the photons are allowed to pass thru the sphere.

Homework Statement This problem comes from Frank Attix's book Intro to Radiological Physics and Rad Dosimetry. From ch. 4 - problem #1: Approximately what diameter for a sphere of water would be required to approach radiation equilibrium wihin 1% at its center, assuming it contains a...

Thank you.

Homework Statement How do you solve this probem for E: E + sqrt(aE) = b where 'a' and 'b' are constants. I don't recall how to handle the exponents where you have E + aE^1/2 = b and solve for E.

Hello all, new member here also. Hopefully this thread is still active. I am working this problem as well. Based on the prior posts, here is how I am approaching the problem - but I'm still having trouble getting the answer in Attix (3.11e5). We know that fluence is the integral of flux...