Recent content by aoner

Thanks!

Okay, thank you! Another shot, still not perfect though: 1) U(1) -> Photon (QED). Quantum number Q SU(2) - > W+, W- and Z-boson (electroweak interaction), Quantum number Y SU(3) -> 8 gluons (QCD) (Gell-Mann Matrices), Quantum number T3 2) The force carriers self-interact so W-W+...

Homework Statement 1) Which U(1), SU(2) and SU(3) gauge invariances are implemented in nature according to the Standard Model? What are the related quantum numbers? 2) The SU(2) symmetry is referred to as a non-abelian symmetry. What does this imply for the interactions between the force...

http://www.invitrogen.com/site/us/en/home/References/Molecular-Probes-The-Handbook/Technical-Notes-and-Product-Highlights/The-Alexa-Fluor-Dye-Series.html

Do you have some more info on your setup? Is your current problem maybe that the light from the laser is too high and that the raman signal is just to weak compared to that. You could use a dichroic or beam splitter to reflect the laser light at one angle and remove it at another. If your laser...

What kind of samples are you scanning?

We can describe the distribution of these energy states with the Boltzmann Distribution with: \frac{{{N}_{i}}}{N}=\frac{{{exp}({\frac{{{\epsilon }_{i}}}{{{k}_{B}}T}}})}{Z(T)}\ Where the partition function Z(T) is defined as: Z(T)=\sum{{{e}^{-\frac{{{\varepsilon...

It's perhaps good to have a look at how your laser looks like. Maybe it has a broad excitation wavelength so what you are seeing is a reflection of the laserlight and not fluorescence. You could think about buying a line filter to remove these unwanted wavelengths.

Ah, yes! Sorry just also came up with that haha. Thanks!

Hi there, So in bragg's law 2d\sin \theta =n\lambda, n needs to be an integer. Can anyone explain why? I mean, what if the extra path 2d that the 'second beam' has is not dividable by a wavelength? Not sure if this is asked before but could not find it! Cheers, Adnan