Recent content by Exulus

Thanks. This has been solved now! Didn't need to take into account the x-ray emission. It was simply a case of using E = p^2/2m...doh!

Just want to say this has been solved now :)

Hi guys (originally posted in the nuclear forum but since found this one), I've been struggling with this problem for a while now and can't seem to get anywhere with it. Roughly speaking: We are given that an Ar37 atom decays through electron K capture into a Cl37 atom and a neutrino, plus...

Hi guys, I've been struggling with this problem for a while now and can't seem to get anywhere with it. Roughly speaking: We are given that an Ar37 atom decays through electron K capture into a Cl37 atom and a neutrino, plus a gamma ray of wavelength 4.2 Angstroms. The binding energy of...

Yeah, we have done it, but a very long time ago and used lots of substitutions and stuff. What gets me is that surely can't be right, because the question is only worth 5 marks. Infact, i didnt even type out the full question..the rest of it is: "Comment on how your solution relates to de...

Thanks sporkstorms :) In that case i think the question is worded very badly...as it doesn't mention what wavefunction to use! The only wavefunction that is mentioned in the entire assessment is in question 1 which is for the harmonic oscillator: u_{0}(x) =...

Hmm...at a guess it means something like this: i\hbar\frac{d\psi(x,t)}{dt} = E\psi(x,t) But that seems too obvious? And how do i solve that without knowing what the wavefunction is?

Hi guys, I've been given this question as part of my homework assessment however i don't even know what its asking me to solve :( I am sure you have to apply it to a certain equation but it doesn't say what! The question is: "Write down the eigenvalue equation for the total energy operator...

:bugeye: I cannot believe i didnt see that. Whoops! Simple things like that...pretty easy to overlook i guess. Thanks for the help..gonna try it out now! :)

hmm..no I am totally lost...sorry :cry: I don't see how you can differentiate the function when you say i don't need to know what it is. I can make a wild guess that dy/dx = 2m/hbar^2..but that would just be guessing and not actually understanding. Could you give me a further hint? To be...

hmm, the only relationships i have in my notes are: u(x) = Ce^{-\gamma x} So \frac{d^2}{dx^2}u(x) = \gamma^2 u(x) Where \gamma^2 = \frac{2m}{\hbar^2}(V_0 - E) edit - just saw your hint..will inspect further! edit again - would i be correct to assume that u(y) = Ce^{-\gamma y...

Hi guys, hoping someone can help with this manipulation. I need to transform this: \frac{-\hbar^2}{2m}\frac{d^2}{dx^2}u(x) + \frac{1}{2}m\omega^2 x^2 u(x) = Eu(x) Into its dimensionless form: \frac{d^2}{dy^2}u(y) + (2\epsilon - y^2)u(y) = 0 I have the following info: E =...

Hi, Yeah i was having trouble with it. I think I've solved it now. I went an incredibly long way around it by calling everything else inside the bracket which wasnt the variable to be differentiated, a constant, such as C. That made me see what was going on a bit better and i think it worked...

I really struggle with calculating errors :( I understand what i have to do, find the partial derivative of each variable and multiply it by the error, square it, add up all the others then square root the total. I just seem totally incapable of doing it :( The expression i have to find error on...

ok I've now got this: E = m_{0}c^2 [\sqrt{1+(\frac{RqB}{m_{0}c\tan{\frac{\Theta}{2}}})^2} - 1] I take it that can't be simplified any further. Ack this is going to be hard to work out errors with! Thanks for your help!