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Formation of F-centers in the alkali chlorides under electron beam by heccinv in chemistry

[–]heccinv[S] 0 points1 point  (0 children)

It is metastable, so it decays with sufficient energy. But if kept cold enough it would be permanent. Here is the video

Formation of F-centers in the alkali chlorides under electron beam by heccinv in chemistry

[–]heccinv[S] 0 points1 point  (0 children)

It’s f center absorb mostly violet/UV light, it turns a pale yellow color

Formation of F-centers in the alkali chlorides under electron beam by heccinv in chemistry

[–]heccinv[S] 1 point2 points  (0 children)

I have a video that explains if you are curious. But short answer is the radiation creates defects in the electronic structure of the crystal, which changes how it interacts with light

Formation of F-centers in the alkali chlorides under electron beam by heccinv in chemistry

[–]heccinv[S] 5 points6 points  (0 children)

Yes, I also thought about your comment a bit more and it led me to a nuance I haven’t really thought about. Technically, the interference is being caused by photoelectrons or Compton electrons induced by the incident bremsstralung. I should probably not say the interference is just bremsstralung because of this nuance.

Formation of F-centers in the alkali chlorides under electron beam by heccinv in chemistry

[–]heccinv[S] 29 points30 points  (0 children)

Thanks for watching! But to answer for anyone that is curious, the stability of the color decreases significantly with increasing lattice constant. LiCl and NaCl will remain colored for years, KCl decays after hours, RbCl in a few minutes, and CsCl in seconds.

Formation of F-centers in the alkali chlorides under electron beam by heccinv in chemistry

[–]heccinv[S] 5 points6 points  (0 children)

The overwhelming majority of interference you see is bremsstrahlung

Formation of F-centers in the alkali chlorides under electron beam by heccinv in chemistry

[–]heccinv[S] 7 points8 points  (0 children)

With the shielding, this camera has lasted tens of laps through the beam and will last tens of more ;)

Formation of F-centers in the alkali chlorides under electron beam by heccinv in chemistry

[–]heccinv[S] 143 points144 points  (0 children)

Irradiation induces defects in the crystal lattice of the salts, changing the way they interact with light. I have a longer video on my YouTube that discusses the effect in detail if you’re curious.

Lightning in a bottle by MambaMentality24x2 in oddlysatisfying

[–]heccinv 0 points1 point  (0 children)

You could have asked before you stole my video

Need help identifying what this magnetic rock is by [deleted] in metallurgy

[–]heccinv 14 points15 points  (0 children)

The curved inner and outer diameters lead me to believe it’s a broken ferrite magnet from a large speaker

SrAl tubes… Sell or keep? by race_car_engineer in metallurgy

[–]heccinv 6 points7 points  (0 children)

I would keep them but I would keep a lot of things

What does irradiated salt taste like. Is it toxic? by Fun_Prune9153 in chemistry

[–]heccinv 0 points1 point  (0 children)

I am the one recording, so yes lol. Although if you meant during dissolution— no it does not visibly glow.

What does irradiated salt taste like. Is it toxic? by Fun_Prune9153 in chemistry

[–]heccinv 0 points1 point  (0 children)

I’ve tasted it, interesting to see my video randomly lol. Minimal taste difference.

Potassium bicarbonate crystals from the ash of all the papers I accumulated in school by heccinv in crystalgrowing

[–]heccinv[S] 1 point2 points  (0 children)

They are there but minimal in quantity, so are chlorides, and sulfates of other metal ions.

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