Materials that are transparent to alpha particles?

In summary, when using Geiger counters, a mica window is commonly used due to its transparency to alphas. However, there are other materials that can also be used, such as extremely thin metal foils or graphene. While nothing is completely transparent to alphas, these materials can be made thin enough to allow most particles to pass through. The choice of material is limited by the need for stability and the desired thickness. When discussing transparency, it is important to specify the type of cross section being considered, such as scattering or nuclear reactions. It is also helpful to know the specific energy of the alphas.
  • #1
Sven Andersson
38
0
A mica window is used on Geiger counters. The thin mica is supposedly very transparent to alphas. But are there other materials? Extremely thin metal foils?
 
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  • #2
Nothing is perfectly transparent (apart from vacuum), but in general very thin foils let most particles pass through. You need a material with sufficient stability which puts a lower limit on thickness.
 
  • #3
Nothing is transparent to alphas. All you can do is use materials that can be made very thin.
 
  • #5
Maybe graphene is an idea? Or a few layers of graphene?
 
  • #6
When you say "transparent", what you do you mean exactly? Low total cross section (including scattering), low cross section for nuclear reactions in general, low cross section for specific nuclear reactions, ...?

And is there a particular alpha energy that you're looking at?

Again, I recommend checking out and comparing the alpha cross sections at Sigma. They don't have a lot of elements, but they have most of the light ones, which are probably going to be your best bet.
 

Related to Materials that are transparent to alpha particles?

1. What materials are transparent to alpha particles?

Materials that are transparent to alpha particles include air, most plastics, glass, and thin layers of metal such as aluminum or gold.

2. How do materials become transparent to alpha particles?

Materials become transparent to alpha particles when the particles are able to pass through the material without being absorbed or scattered. This usually occurs when the material is very thin or does not contain dense nuclei that can interact with the alpha particles.

3. Can any material be made transparent to alpha particles?

No, not all materials can be made transparent to alpha particles. The material must have a low atomic number and be thin enough for the particles to pass through without being absorbed or scattered.

4. How do scientists test for transparency to alpha particles?

Scientists use various methods to test for transparency to alpha particles, such as alpha particle spectroscopy or alpha particle scattering experiments. These methods involve directing a beam of alpha particles at the material and measuring how many particles pass through or are scattered by the material.

5. Are there any potential health hazards associated with materials that are transparent to alpha particles?

Yes, materials that are transparent to alpha particles can be potentially hazardous if they contain radioactive substances that emit alpha particles. In this case, the alpha particles can pass through the material and potentially enter the body, causing damage to cells and tissues. It is important to handle these materials safely and use proper protective equipment when working with them.

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