Cloud chamber - nuclear chemistry

In the video, I introduced you to the cloud chamber in our nuclear physics lab and demonstrated the behavior of different types of radiation.
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0:00 basics
1:36 Beta trails
2:10 gamma trails
2:21 Cs-137
2:42 Na-22
3:41 no annihilation?
4:13 Radon
5:38 Radium
6:13 Bye :)
6:28 relaxing stuff
#radioactivity #antimatter #radon

[@DicedIceBaby314]

Came for the lesson, stayed for the radon! Thanks for the great content!

[@RobertCraft-re5sf]

I fuggin love Radon

[@Barc0d3]

Love cloud chambers, so easy to create for any curios mind :) It's mind-blowing actually.

[@The-One-and-Only100]

Cloud chambers are always fun

[@RobertCraft-re5sf]

You're always fun! you silly goose 😅

[@The-One-and-Only100]

​@@RobertCraft-re5sf ?

[@James-xu3vc]

Have never seen the beta trails before. Very cool 😎 ❤

[@RafaCB0987]

Soo beutiful, the emotion of using radon is real

[@ihmejakki2731]

Love cloud chambers!

[@mewtwoinchernobyl]

Excellent content! I always appreciate watching your videos!

[@FullModernAlchemist]

Incredible work my friend ❤

[@RobertCraft-re5sf]

2:19 "GAS CHAMBER" In German accent lmao

[@crono331]

I built a peltier cell based cloud chamber. Pretty small. Sometimes it works Sometimes it doesn't and cant figure out why

[@cpm1003]

It's interesting that the trails seem to appear not as instantaneous lines, but traced from one end to the other. Surely the particles are moving much faster than that?

[@plutoniumiscool]

Using a high speed camera to see the trials would be very interesting.

[@SimonsNuclearchemistry]

It takes a siginifcant time for this condensation to set in to a point where you can see it. The Alpha Particle is long gone

[@cpm1003]

@@SimonsNuclearchemistry Do you think the direction the trace seems to appear in matches the direction the particle was travelling? Or maybe it has more to do with gradients of temperature or propanol concentration? The "V" shaped traces could help determine this.

[@SimonsNuclearchemistry]

@@cpm1003 they Form in the correct direction of flight from the radiation. But the trails eventually sink down due to gravity

[@brfisher1123]

I’m surprised you didn’t consider putting some potassium chloride salt in that cloud chamber 🧂 ☢️

[@SimonsNuclearchemistry]

BOOOOORING

[@brfisher1123]

@@SimonsNuclearchemistry I’m guessing it would be so weak that you probably wouldn’t even notice it, right? lol 😂😂😂😂😂

[@Astro-adventure]

Every time I’ve tried to make one it failed miserably lol

[@Barc0d3]

did you try with Peltier? It's pretty easy, combined with water cooling.

[@Astro-adventure]

@@Barc0d3 I just use dry ice

[@jeremydouglas1763]

I'm interested that it's possible to see a gamma trail. I would have thought that the gamma ray, being a single photon, would only produce one ionization as it was absorbed. So how is the trail produced? Are the gamma rays being Compton scattered as they ionise? If so why is the trail so straight?

[@SimonsNuclearchemistry]

Yes they can be scattered and the angle of comptonbscattering be anything between nearly 0° to 180° and the electrons that are knocked out can themselfe ionize other molecules

[@jeremydouglas1763]

@@SimonsNuclearchemistry Ah OK! So is the trail mainly caused by the secondary ionisation from the knocked-out electrons? And the gamma is so high-energy that the scattering angle for the gamma is around 0°? Or have I misunderstood?

[@yaykruser]

What would we see in you had the neutron source next to it? ( un / moderated)

[@SimonsNuclearchemistry]

Thats what I wanna find out in part two :D but I haven't had time to really think about that. I also wanna see neutrons in there^^

[@yaykruser]

@@SimonsNuclearchemistry I am reading your mind.😝 What if you put a small piece of beryllium infront of the radium cannon, that should produce a few neutrons, shouldnt it?

[@SimonsNuclearchemistry]

@@yaykruser 3,3kBq is quite weak tho. But worth a try. Might search around for a stronger Alpha source. Maybe the physics people have something (its their cloud chamber)

[@RobertCraft-re5sf]

Why does it cause it to condense? I'm stupid, and I don't really understand.

[@SimonsNuclearchemistry]

Lets just say we have Ethanol. Its polar because of OH-Group. So if an Alpha particle makes one of these EtOH Molecules, a cation, this positive charged EtOH+ can now more strongly attract the electronpair of the OH-group of another EtOH molecule, pulling them together and so on until you have a visible drop. Ofc VERY strongly simplified. That happens not on a "one molecule, then another" scale but talking several 100-1000 initially. Minute earth has a great Video about "the secret of raindrops" ... how they Form ;D

[@RobertCraft-re5sf]

@@SimonsNuclearchemistry Thanks! I figured it just messed with the molecules or something.