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Feb2313 08:41 AM
ZapperZ

1 
25,732 
I'm writing a little bit of Mathematica code that should be able to make a reasonable powder diffraction spectrum. The...

Y 01:35 PM
SadScholar

0 
104 
All the books that deal with the pn junction under applied bias asume that the same equations used for the...

Y 03:05 AM
zhanghe

2 
904 
Why are absorption cross sections for atoms so much larger than that of molecules.
For example, the absorption...

Y 02:33 AM
Simon Bridge

4 
180 
Dear mates:
During ionization with radiant energy there is a photon emission (see ...

Aug2014 09:56 PM
euquila

3 
101 
Would one expect the emission and absorption spectral lines for Hydrogen to be at slightly different frequencies ? So...

Aug2014 04:38 AM
neilparker62

3 
252 
The following website explain this concept badly:
...

Aug2014 01:00 AM
Zashmar

0 
114 
Hi people,
I'm researching about the interactions of two carbon atoms using the LennardJones potential and I need...

Aug1914 09:15 PM
Kjiel

2 
328 
I am trying to understand what is meant by the phrase 'absorbed and emitted bosons'. Is it the same as destroyed and...

Aug1914 12:41 PM
AlexanderRios

2 
153 
After specifying the primitive vectors of a structure namely (a,b,c) in Wien2k, one has to specify locations of atoms...

Aug1914 11:57 AM
hokhani

0 
116 
I have some XPS spectrums that I am trying to fit (my first time doing so), using XPSpeak.
I understand that for...

Aug1814 03:18 AM
M Quack

1 
168 
Hi,
I have a question regarding the temperature dependence of the light yield in scintillators.
I will attach a...

Aug1814 12:32 AM
e.bar.goum

2 
266 
what is the rule of delta E= A/r^12 _ B/r^6 ????

Aug1614 05:04 PM
Vagn

1 
202 
Hi Guys, I read that the Fermi level of semiconductor, like germanium, is inbetween the completely occupied upper...

Aug1614 12:28 AM
Simon Bridge

1 
221 
To whom is able to answer this:
I think that when radiant energy get in contact with matter three basic phenomena...

Aug1414 03:26 PM
mathman

1 
285 
Good evening.
Usually we say that during lightmatter interaction, energy of light should be transferred piece by...

Aug1414 03:51 AM
xxfzero

6 
460 
Dear All,
for different oxidation states of the same element in Xray photoelectron spectroscopy measurements,...

Aug1314 10:17 PM
Greg Bernhardt

1 
271 
Why is electron rotating in h/2pi orbit does not radiate energy

Aug1314 12:50 PM
cbram

4 
312 
Hi,
I got the complex conductivity vs. frequency table of a metamaterial. Its first lines are like this:
f ...

Aug1314 02:54 AM
DrDu

3 
354 
So i'm trying to use the excitation law of Boltzmann and the ionisation law of Saha to calculate stuff about what...

Aug1214 03:56 PM
Greg Bernhardt

1 
304 
Hello guys, first post in this forum :)
Magnetism has always been complicated to understand for me, and I would...

Aug1214 03:28 PM
M Quack

3 
325 
According to the schematic (FIG 1) in this paper (http://journals.aps.org/prb/abstract/10.1103/PhysRevB.80.085202)...

Aug1214 01:53 PM
Useful nucleus

5 
400 
I have some confusion about multiple scattering.
We always say that the problem of single scattering is always...

Aug1014 12:02 AM
vrinda mukund

15 
448 
Hello.
I have been in contact with some papers that use DFT softwares for calculating properties of solids,...

Aug814 08:48 AM
Useful nucleus

6 
760 
Hi
Here is the number for the measured frequency for hydrogen 1s to 2s transition:
2 466 061 413 187 035 Hz
...

Aug814 04:51 AM
neilparker62

4 
361 
Hi Everyone,
I was curious as to what the most current model in solid state physics is. I've studied the Einstein...

Aug514 09:05 AM
irishhockey

4 
499 
Learing about matter and what it is composed of, I'm spending a lot of time trying to wrap my brain around the idea...

Aug414 12:20 PM
phinds

22 
1,295 
I've heard any many places that the density of states (DOS) can be determined from an xray photoelectron spectroscopy...

Aug414 01:37 AM
t!m

1 
273 
What is the difference between complete and incomplete mode locking in charge density wave systems?

Aug314 12:01 PM
Greg Bernhardt

1 
343 
Hi Guys! I have a confusion which I hope you can help clear up. The mathematical expression of the first law of...

Aug314 12:02 AM
Simon Bridge

1 
300 
You can use transfer matrix method for 2d Ising model. Is there a list of models for which this method could be of...

Aug114 09:37 PM
t!m

1 
372 
My base understanding of the solar cell is as follows: Light hits metal in solar cell and emits electron via...

Aug114 09:22 PM
t!m

1 
325 
In a perfect periodic crystal, do lattice vibrational modes corresponding to different wave vectors (kvectors)...

Aug114 03:33 PM
DrDu

7 
511 
Hello,
I am wondering about a photon absorption/emission by an atom.
We have been told at the university an...

Aug114 10:08 AM
SJ

4 
431 
So if a Titanium Ion has a charge of +2, does that mean it has a whole charge of twice the electron charge....so 2Xe?

Jul3014 07:43 AM
Alok Ranjan

4 
751 
It's known that the Density of States in 2D is given by,
g_2(E)dE = \frac{a^2m}{\pi\hbar^2}dE
The density of...

Jul2914 10:37 PM
acb

2 
1,312 
Hi,
I just read a paper on graphene's basic properties and it says that since current density J is given as
...

Jul2814 05:00 PM
Greg Bernhardt

1 
543 
I have been chewing up some time ago the SchottkyMott theory of Schottky Barrier height (which ignores the surface...

Jul2814 05:00 PM
Greg Bernhardt

1 
692 
Hello!
I was wondering what would happen if you placed a piece of undoped Si in an external electric field (say,...

Jul2814 12:04 AM
Sunfire

1 
436 
Hello everyone.
I am a Hungarian born Australian theoretical/applied physicist. This is my first post on the...

Jul2614 12:32 PM
steve_h

3 
1,030 
I knew this may not be possible, but I was wondering if you can compare kinetic energy with the energy that makes up...

Jul2514 03:06 PM
mathman

3 
705 