What is Radioactive Decay? Half Life | Decay Constant | Activity (+ Problems Solving)
The Law of Radioactive Decay tells us how the number of a radioactive sample changes with time. Usually it is an exponential decay process.
Even though the different radioactive processes like alpha decay, beta decay or gamma decay are different from each other in terms of the particles emitted etc, they all share the same kind of decay law.
Half Life is defined as the time period in which the initial number of radioactive samples reaches half its original value.
Decay constant and half life are inversely proportional to each other. These quantities are a characteristic of the radioactive sample present, and is independent of the physical parameters like pressure, temperature, density etc.
Mean life is the average lifespan of all radioactive samples present.
Activity is the rate of radioactive decay, or the number of disintegrations happening per unit time. Activity also decreases exponentially with time.
We can use the conclusions derived from the decay law and other parameters to solve different problems of radioactive decay.
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1) What is Nuclear Physics? ► • What is Nuclear Physic...
2) Nuclear Size / Radius ► • Nuclear Size / Radius
3) Quantization of Angular Momentum ► • What is Quantization o...
4) Nuclear Spin and Angular Momentum ► • Nuclear Spin and Angul...
5) Nuclear Magnetic Moment ► • Nuclear Magnetic Moment
6) Binding Energy of Nucleus & BE Curve ► • What is Nuclear Bindin...
7) Parity of Wave function ► • What is Parity of a Wa...
8) Symmetric & Anti symmetric Wave func ► • Symmetric and Anti-sym...
9) Liquid Drop Model of Nucleus ► • Liquid Drop Model of N...
10) Corrections to Liquid Drop Model ► • Corrections to Liquid ...
11) NZ Graph (& Maximizing BE) ► • What is NZ Graph? | Ma...
12) Fermi Energy of Nucleus ► • Fermi Energy of Nucleu...
13) Fermi Gas Model of Nucleus ► • Fermi Gas Model of Nuc...
14) Shell Model of Nucleus ► • Shell Model of Nucleus
15) Nature of (Strong) Nuclear Force) ► • Nature of (Strong) Nuc...
16) Alpha, Beta & Gamma Decay ► • Alpha, Beta & Gamma De...
17) Gamow's Theory of Alpha Decay ► • Gamow's Theory of Alph...
18) Gamow's Theory (DERIVATION) ► • [DERIVATION ] Gamow's ...
19) Q Value and KE of Alpha Decay ► • Q-Value | KE of Alpha ...
20) Beta Decay & Neutrino Hypothesis ► • Beta Decay & Neutrino ...
21) Radioactive Decay Law ► • What is Radioactive De...
22) Nuclear Cross Section ► • Nuclear Cross Section !!
23) Interaction of Nuclear Radiation with Matter ► • Interaction of Nuclear...
24) What is Cherenkov Radiaton? ► • The Physics of Cherenk...
25) Nuclear Detectors ► • Nuclear Detectors - Io...
26) Geiger Muller Counter ► • What is a GM Counter? ...
27) Scintillation Detector ► • What is a Scintillatio...
28) Semiconductor Detectors ► • What are Semiconductor...
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35) Fission & Fusion ► • Nuclear Fission and Fu...
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Пікірлер: 188
Sir, you do an amazing job. Your way of interpretation is simple, and too informative! I shared your nuclear physics playlist with my friends, and they do admire it. Keep the hard work up! Follow you from Egypt! 🌏
@FortheLoveofPhysics
5 жыл бұрын
Thank you so much for your kind words. I am very glad that u found my work helpful. It is this that keeps motivating me.. :)
@STUDIOUSBRO
4 жыл бұрын
@@FortheLoveofPhysics how to find decay constant of mixture of sample with decay constant lamda1 and lamda2
@pushkarkushwah2128
3 жыл бұрын
There is no any other options as u teach sir, God bless u
@akshatpandey9141
2 жыл бұрын
@@FortheLoveofPhysics I myself as a student of physics admire ur good work. Ur explanation is very simple and understandable. Keep it up. Love ❤ from Bhagalpur, Bihar.
@user-mt7if9ru3w
10 ай бұрын
I follow your channel and find it very helpful. I am from Saudi Arabia, Taibah University
these kinds of channels, keep my love for physics constant. No half-life here. Thank you for wonderful content.
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Nuclear & Particle Physics - Playlist: kzread.info/head/PLRN3HroZGu2n_j3Snd_fSYNLvCkao8HIx
Love your way of explain the concepts and your English is so good.
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A wonderful explanation from u that ur Interactiveness is quiet awesome and u makes the topics intesting and joy full thanks for that lesson... Lots of love from INDIA.... 💚💚
Sir, thank you very much for your videos. your method of teaching is amazing...its difficult to find such a good teacher like you for this subject even in sri lanka also...knowledge and explanation skill are two things. Lot of teachers have a good knowledge, but they are fail in explaining something to others. I appriciate your work and it is very helpful to my studies. good luck...
@FortheLoveofPhysics
5 жыл бұрын
Thanks a lot for your encouraging comment :)
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@FortheLoveofPhysics
4 жыл бұрын
Thank you and welcome :)
good lecture.I wish u also tell some about radiationprotection. effects.
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@FortheLoveofPhysics
4 жыл бұрын
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With increase in time ...number of undecay particle decrease...that those who decaying or become stable is mass also decreased
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Who are the five that have disliked this video. How can one not manage to like such a lesson.
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Thank you so much sir great explanation sir please make videos on quantum mechanics
Great 👍
Thankyou sir
Great teaching Professor.. Appreciate your efforts to make things utterly simple to understand by analogical examples. I have few doubts, which I hope you will try to find time to clarify. How half lives of different isotopes are measured. Like, I can guess, for radio-isotopes with half lives in days, months or few years, it can be measured from the slope of their decay curves made from periodic measurements of chemically separated samples. But for isotopes having half lives in nanoseconds, microsecond or even seconds and minutes how it is measured? Also for isotopes like U-238 which has half lives in billions of years, which virtually does not decay at all in measurement time scales, how practically their half lives are measured? I hope and wish that, you will come up with a video for these doubts. Thank you so much
@FortheLoveofPhysics
4 жыл бұрын
Half life is one parameter. If you take any radioactive material, and calculate its mass variation over a sufficient time period, you can plot it as an exponential function and from there derive all necessary parameters
@pradyumnalenka8411
4 жыл бұрын
@@FortheLoveofPhysics How practically it is possible to estimate half life of a short-lived radionuclide e.g. Po-214 or Po-218 or Po-212 and there are many others, whose half lives are in micro or nano seconds. In practical measurement time scale mass variation can not be measured, as in a second all activity will be decayed to near zero level.
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It is more important to understand the deep concept so plz explain in Indian language which most students know (hindi).
Plz made a video on measurement of life time of excited states
wow perfect 💜💜
can you please make a video explaining Bateman equation secular and transient equilibrium?
Limits for mean life time in numerator should be from 0 to No as we integrating wrt dN, if i'm not mistaken.