Recent content by prochatz

What do you mean? Can you be more specific. I want a mathematical relation which proves that N=1.5Z for heavy nuclei.

Hi, there. I was trying to prove a relation about the most stable situtation for a nucleus. According to the semiempirical mass formula, the less mass a nuclei has, the most binding energy has and, of course, the most stable is. I followed the "liquid drop model" (Weizsacker) for the binding...

I see, but there must be an answer. Something goes wrong. Is there any definition about the density of lattice's points?

The second explanation seems better. So if we have a specific plane, suppose in the fcc, how should I compute density? Should I count the points "contained" in the specific plane and then divide by the area of plane?

Yes, but here we have planes. What should I suppose? Is density 1/(area of plane)?

Hello, there. I'm having a small problem with Miller's indices. 1) Imagine that the plane (2 1 1) is given in the fcc lattice. How can I determine Miller's indices of that plane in the sc and in the bcc? 2) And after that, how can I find the density of lattice's points? 1) So far I took the...

As far as I know electronics cannot work efficiently in high temperatures. This is one of the reasons we must use methods to cool off our system. I did not mentioned that Argon is the only possible element someone could use. However, Argon is one element that works well enough. An element that...

In order to construct an effective calorimeter someone must, first of all, take into account all the parameters of the experiment that may lead to fail. I'm talking about the LAr Calorimeters in Atlas experiment. Not an ordinary calorimeter. That's right, I mean tracks. Before constructing...

Considering the Atlas experiment, which are the basic theoretical decisions someone must take in order to create an effective calorimeter? In other words, which are the basic problems that someone must solve to achieve the best possible effectiveness? For example, the high temperature problem...

Hello. I was wondering what's the purpose of using Thallium (Tl) in Iodine Sodium (NaI) scintillators.

Isn't it weird? In both the previous procedures, beta particles are traversing the same distance in air and two Al-foils. Shoudn't the counts be the same?

Thanks for your answer. Suppose we have two identical aluminium foils and a source that emits a vertical beam of beta particles (Sr-90). Suppose that I place a G.M. detector in a distance of 6cm over the source. Then, I do two procedures: a) I place the two identical Al-foils very close...

If we want to secure an area from beta particles, we could use absorbers, for example aluminum foils. Is it preferable to use one thick aluminum foil or several aluminum foils (with same total density as the first one of course) with free space between them? In other words, does a beta particle...

Suppose a beta particle source. Using a G.M. scintillator and several aluminium foils we can find the absorption of aluminium on beta particles. Does the absorption of aluminium changes by placing aluminium foils over or under the radioctive source? Considering for example gravity. Does gravity...

I believe that General Relativity works perfectly in universe so far. Its predictions match perfectly with the authentic orbits of the planets... etc. The problem is somewhere else: @SpaceTiger Exactly! For me, the misunderstanding is based on the geometrical interpretation of GR. Which...