Hi!
What can be said about the intensity ratios of characteristic X-rays (Kalpha to Kbeta ) originating from a X-ray tube? I mean roughly and in general, not for some very specific anode material.
I first thought that K-L (Kalpha) transitions would be more likely to happen than K-M:s...
Kippis!
Hello nordic friend! I really like Helsinki, I was there a few weeks ago and have good friends there.
I think I will do what you suggest, yes. I feel I connect well with at least one professor, and perhaps she can give some advices aswell.
By the way, we go for master right away...
Hi!
I feel I am on the road to research, and I would like to get some experience. I've been starting to look for something like the REU programs, but the problem is they are only open for US citizens. I guess it has with the funding to do.
I must congratulate you US people on this forum...
Yes, of course the experimentalists can stand there empty handed. But I think that for example the LHC will be historical anyway, either since it discovered the Higgs or because it proved the theory wrong. And just the effort of building the LHC+experiments will be worth a note in the history...
Hi,
I've been looking at ways to create Higgs bosons in lepton colliders, mostly muon colliders. I have a question on how one would be certain that it is actually the Higgs that has been found.
The main channel that is going to be used seems to be the so-called s-channel, where
\mu^+ + \mu^-...
No I don't mean n=1 but rather 2S+1 = 1. I tried to hang the "1" a bit higher with tex-code, but it didn't work out perfectly I guess. To clarify: with upper case I mean the total spin/orbital angular momentum of all the electrons and with lower case spin/orbital angular momentum of an...
Hello,
there is one thing about atomic states I don't understand. I try to look at what states are possible for a np^2 configuration (that is, all lower shells are filled and don't contribute to the case). For example my textbook says that the ~^1 P state is not allowed because of the Pauli...
I think so too, and I think I usually do so (in forums and in real life). In case one doesn't I think the whole point of learning is kind of forgotten.
I take that as a compliment =) And I think your intentions are wise, for my part I will do my best to follow them.
Thanks for the feedback...
Hi,
as it is being discussed today, I would like to ask about how to post correctly on physicsforums.com. I re-read the (updated?) agreement today, and I found this rule about where to post questions. I am still an undergraduate (I think, the levels seem to be different in different countries...
A question concerning atoms in magnetic fields:
Why does the LS-coupling break down in a strong magnetic field (Paschen-Back effect)? I have until now only gotten this stated as a fact, but if anyone could give a few arguments it would be appreciated. Why aren't the individual components of...
Hi!
I'm doing a basic course in atomic physics, and right now I'm looking at quantum beats. I've found several sources for basic descriptions, but there are some things that confuse me. I'm going to present some of the material in short here, and hope for comments that might make things more...
Hello,
in my lecture notes I have made a note that if V is a local potential, then <r|V|r'> is diagonal. Is this true, and how come?
It popped up with the Lippmann-Schwinger equation, and I know it's important that V is local, but does really locality implicate diagonality?
Jonas
Aaaah, thanks George, now I sort of get the question I was trying to answer. Didn't make any sense to put question of type 1 in a test (which I am looking at).
For case 2 I certainly get a mixed state. I did this approach:
In case we measure a_1 the wave function collapses into:
|\Psi_1> =...
Hi there,
I was looking at a problem, where the state (a pure state) of a two-particle system was given as:
| \Psi> = A_{11}| a_1 b_1 > + A_{12} | a_1 b_2> + A_{21} | a_2 b_1> + A_{22} | a_2 b_2>
In the system particle a can only be in the states a_1 or a_2 and particle b in b_1 or...
Hi all,
we're looking at scattering theory in the QM course right now, and I've got a question concerning the approximative ways of calculating the phase shift \delta_l of the partial waves in the partial wave expansion of the scattered wave.
One way (the semi-classical) to calculate it is...