Gamma Rays | Nuclear Radiation Explained | Doc Physics

Do not hang around excited nuclei.

Somebody once told me that nuclei can't get excited, but that only electrons can. HA!

[numansalih]

People like you are the reason people love science !

[hiphopism]

Your lecture is like beautiful music to my ears.

[emailshafihusain]

Life could have been so better if I had a teacher like you in my school days...

[mnoori]

"You better get out the way!" lol but it's so much energy we can't see it! haha

[DocSchuster]

Thanks, and great question. The photoelectric effect is when the light has enough energy to IONIZE the atom in question. This means the electron is actually freed from the metal, not just moved to a higher energy state. It is best applied to light hitting solids, where the electrons are in much more complicated bands rather than the simple s, p, d, or f shells of single atoms. You want a diffuse gas in order to study the properties of atoms on their own.

[DocSchuster]

And finally, electrons are fundamentally identical, so in certain conditions it is impossible to say which electron fills the hole presented by a newly excited electron. Maybe it's a Chinese Fire Drill, or maybe the excited electron just falls back down. Either way, light is given off and all electrons eventually return to their lowest allowed energy.

[DocSchuster]

Ultimately, this discussion belongs on another set of videos on atomic transitions, not nuclear transitions. Yes, the PE is just metals in vacuum tubes, but it teaches us about the particle nature of light.

The decay is spontaneous and its likelihood depends an incredibly complex infinite series of integrals. Luckily, Richard Feynman was brilliant and realized we can also calculate transition probabilities using pretty pictures. Wik: Feynman Diagrams. Schuster out.

[ahmadkamran]

I love your videos, you are so fun that I felt like I was in a nerd heaven. God bless you Sir. 🤗

[tilimannimensch]

Clean and simple! Great job making this better understandable for noobs like me.

[Kovu]

Wow if every scientist was as exited when discussing science as you are the world would be a way better place

[markspy]

love your videos man your an awesome teacher!

[petergorkiewicz]

Move physicist! Get out the way! Get out the way physicist; get out the way!


Thanks for the video. Love the energy.

[aradhanasingh]

I literally don't understand a single word but it looks still interesting to watch LOL.

[DocSchuster]

What is your research? I did a good bit of NMR at 300 MHz back in the day - that was my thesis work!

[catacalysmicphysics]

Fun Fact: Carbon 14 is mainly used in the process of carbon dating, cool

[krypton]

coool, you made it easy and simple, , ,

Thanks

[casualdiscgolfguy]

im making a one pager about gamma rays and i stumbled upon this video... i am going to subscribe and look at more of his videos

[kskim]

This 4-min video is better than ten 100-page books.

[MelinaHristova]

Watches Chernobyl once... Becomes Nuclear Physicist through YouTube

[nickstellar]

Well, then does that mean all elements/isotopes undergoing beta decay MUST undergo gamma decay afterwards? Also what causes the Nitrogen 14 to be excited? There are 6 electrons in the valence, beta decay will just stick another electron in that valence to make it 7 no?