Gamma decay | Physics | Khan Academy

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During gamma decay, an excited nucleus releases energy in the form of a gamma photon. Gamma radiation is high-energy electromagnetic radiation (light) which has a shorter wavelength and higher frequency than visible light. Gamma rays are ionizing radiation. The number of protons and neutrons in the parent nucleus does not change, so the identity of the daughter nucleus is the same as the parent, but in a lower energy state.
Sections:
00:00 - Intro
00:30 - Alpha, beta, and gamma decay
02:52 - Radioactivity does not glow
04:25 - Gamma radiation energy level
06:00 - Gamma decay of nickel-60
07:50 - Gamma radiation penetration power
10:06 - Gamma decay application
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Пікірлер: 16

@lllena1263 Ай бұрын

This is actually really helpful because I missed a week of school when we were talking about nuclear decay and my Chemistry final is tomorrow.

@jimboase5005 23 күн бұрын

An excellent tutorial; a straight forward explaination of nuclear physics

@vikapavelitsa2393 5 ай бұрын

Your explanation is absolutely incredible! Thanks!

@yanovoyair5129 5 ай бұрын

gracias por existir khan academy

@jamesduran9348 5 ай бұрын

Amen

@federalbureauofinvestigati2725 3 ай бұрын

This guy is amazing

@DevN049 5 ай бұрын

Love you mahesh sir

@mikeoftheclandobson5483 9 күн бұрын

Loving your videos!

@Y05H420 4 ай бұрын

So when the elections in the circuit pass this np junction as they pass that junction that's when the photon is created? Are these photons a gamma radiation, but just not of a non ionizing quality

@dennisford2000 5 ай бұрын

So on the emission of the gamma ray does the nucleus lose mass?

@christinejackson6630 5 ай бұрын

Yes. Mass and energy are related by E=mc^2. When a nucleus loses energy, its mass decreases. The change in nuclear mass during a gamma decay is small, but nonzero. And E=mc^2 is actually a simplification of a larger equation which includes a momentum term. But that term is only significant for particles moving near or at the speed of light. A gamma photon for example-it has no mass but it has momentum and energy, and moves at the speed of light. So the momentum term is important for calculating its energy. But for a nucleus at rest, the equation simplifies to E=mc^2.