Recent content by CloudNine

Thank you so much! Everything is well explained :) Can you just please explain why sigmaC/C = sigmaD/D?

CPM is measured - the gamma readings of the sample. So one measure for the wire -> W second measure for the vial with the remaining material -> R

Not sure to what you are referring in this statement? :P Just wanted to make sure that s(W)2 simply equals to w, because I'm not sure if it equals to [s(W)]^2 or not.

just so I make sure I didn't get lost...: s(W) = sqrt(W) s(W)2 = W Correct?

Both of my questions remain though, I kinda knew that I should use the Poison theorem for the calculations :) How do I deal with the "complex" term W+R in the error propagation?

You are correct, indeed collection fraction would be the correct term. sR is the the error in R (as in ∆x in the original formula notation)

Didn't want to add complexity to the story, but maybe it is inevitable :) I'm collecting a radioactive material on top of a wire, and so I measure the CPMs (with a gamma detector) on both the wire and the residue to see the amount of activity that was attached to the wire.

Hi all, I'm having a bit hard time performing error calculations on one of the lab results I got. The lab dealt with finding collection rate of a certain material onto a wire. While inside a vial, the wire was soaked in the material for a specific period of time. Then the wire was taken out of...

You are right. However, in this case (as I know what to expect), it should look just fine even on a regular scale.

There are a lot of variables in this formula. I changed all units so I can end up with MeV/cm. I suppose the problem is indeed relevant to the units, but, as I wrote, I can not find the mistake... hence this post. The ionization potential is given in eV in the exercise so I turned it to MeV...

Here's the plot: I know it is not the right plot as the lecturer showed something similar in class and it looked differently...

Hi all, I got an exercise to plot Bethe-Bloch function (ignore the "Compare..." part, it belongs to an exercise above), for alpha particle in Xenon. See the question below: I've been struggling to get a plot that makes sense. I checked my parameters and the units a million times already, but...

Yes I think you are right. I've dived into the theoretical explanations again and things make more sense now, and so I'm able to compile a coherent answer (hopefully). Thanks!

Hi all, I have received this following question which I can't really figure out all the way to the end: Consider the beta decay of 212Pb: * What is the probability that the decay leads to the second excited state of 212Bi at 238.6 keV? This is straight forward - from nndc NuDat, it seems...

Hi all! I would like your assistance with wrapping up my thoughts regarding the following problem. Say I have Am-241 nuclide, which emits alpha particle in every decay (for the sake of this discussion, let's assume that 100% of the decays lead to a daughter nuclide, Np-237 + an alpha...