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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[@lllena1263]

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.

[@vikapavelitsa2393]

Your explanation is absolutely incredible! Thanks!

[@yanovoyair5129]

gracias por existir khan academy

[@jamesduran9348]

Amen

[@jimboase5005]

An excellent tutorial; a straight forward explaination of nuclear physics

[@federalbureauofinvestigati2725]

This guy is amazing

[@DevN049]

Love you mahesh sir

[@mikeoftheclandobson5483]

Loving your videos!

[@Y05H420]

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]

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

[@christinejackson6630]

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.

[@babyoda1973]

Ok can we excite a single proton

[@yabsirabelete526]

U r the real 🐐🔥 the 2nd comment pls pin🙏

[@solomon9388]

what app is this writing on?

[@Mahesh_Shenoy]

Sketchbook

[@jyotirmayMishra7]

Your videos are always interesting 🙏🙏
first comment please pin