## Decay constant

Decay constantproportionality**decay constant**the size of a population of radioactive atoms and the rate at which the population decreases because of radioactive decay. This shows that the population decays exponentially at a rate that depends on the decay constant.

*Decay constant*time required for half of the original population of radioactive atoms to decay is called the half-life. Dcay welcome suggested

**decay constant**to any of our articles. You can make it easier for ciclo winstrol y oxandrolona oral to review and, hopefully, publish your contribution by keeping a few points in mind.

## Decay Formula | Decay Constant Formula | [email protected]

In my curriculum, the decay constant is "the probability of decay per unit time". To me, this seems non-sensical, as the decay constant can be greater than one, which would imply that a particle has a probability of decaying in a time span that is greater than 1.

You're missing two things. First, that the decay constant is the probability of decay per unit time. That part is important. The actual decay probability over a short time period is equal to the probability per unit time, multiplied by the time period:.

So there's no contradiction there. You have to start with an undecayed nucleus. But if the nucleus did decay in the first time interval, the probability that it will have decayed by the end of the second time interval is 1.

So the equation for exponential decay emerges naturally from the fact that the decay constant is the decay probability per unit time for an undecayed nucleus. Or of course the same argument applies to any other system that undergoes exponential decay, not just nuclei. As written here , it's proportionality constant between size of population of radioactive atoms and the rate at which the population decreases due to decay: Looking at the solution of the equation above we can say: If you read the article your question links to after editing by Qmechanic, you'll see another examples of exponential decay, not only for radioactive decay.

The probability that a single nucleus decays in a short period of time is approximately given by the decay constant multiplied by the length of the time period. This is only a first order approximation of the exponential decay. If the decay constant is larger than one, the time unit it is given in is obviously too large for the first order approximation too be valid at that time scale.

By posting your answer, you agree to the privacy policy and terms of service. Questions Tags Users Badges Unanswered. Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Join them; it only takes a minute: Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top. What does the decay constant mean? In my curriculum, the decay constant is "the probability of decay per unit time" To me, this seems non-sensical, as the decay constant can be greater than one, which would imply that a particle has a probability of decaying in a time span that is greater than 1.

Can someone explain this? DarkLightA 2 10 The actual decay probability over a short time period is equal to the probability per unit time, multiplied by the time period: Decay constant isn't a probability. Ruslan 5, 3 24 What does it mean for a dimensional constant to be larger than one which is dimensionless?

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3out of 5majorsvs–Pics soon to come. Im going to see if I can't find someone with a skinfold caliper to test out my bf. Updated weight, measurements and etc to come too. First log ever. Tell me what I'm missing. Could use support too . Im a feedback whore.

3out of 5mishytka1993–on average i get about 160g's of my protein from this mix

4out of 5qwerty212121–chick was on the only area I can do this in my gym for like 20 min, I had to leave so they got cancelled for today)

5out of 5sirdute–2. Do you guys lose any muscle mass when you stop taking this stuff? Lets say I took it for two months. Cycled on and off during that time. But after two months I stop totally. Would I lose the muscle like you do with Steroids? Does the body and muscles require this stuff in order to stay big?

4out of 5spejisinger–190 (each x 10

5out of 5angel33–Great job healthy! I knew you could do it![CSVLB]Thanks Luke and AMG.

3out of 5xlunii–And the curse continues. They play the Giants coming of the bye week, in NY after a tough loss. Giants will DOMINATE the offensive line, and Atlanta will be looking 5-5 in the face.

4out of 5kIvEr4–Shoulder press: 50x6, 55x

3out of 5GOLDY111–Less worried about strength gains going away after today, did mostly bodyweight, dumbell and barbell motions, and I got stronger in them all, so that's great, the lat pull down is heavier at the Y and so is the Seated Row, but it was pretty obvious it was the machines being heavier and not me being weaker after the success with the other excercises. :)[CSVLB]good man.happy bday tomorow.see ya[CSVLB]good man.happy bday tomorow.see ya

5out of 5rero1991–Good to know, I was wondering how to take my dosages when i begin my SD/PP cycle.

5out of 5dd2–got home had a chicken breast with veggies with multi and fish oil

3out of 5GOLLUM–Chin ups BWx5x3

3out of 5igorjok2067–You're joking, right? :rolleyes:[CSVLB]if you said you would order n-large 2 and creatine outside of mhp why wouldn't you get up your mass or trac if there the best?

3out of 5ytrh95–Monday, February 23, 2009 (Week 11)

5out of 5karateJIb–Ortho Core is their premium multi version and it adds some extras to the Multi Basics great formula.

3out of 5m1n1maLCRAFT–This stuff really helps with calorie partitioning. I am going to up the cals little by little to see what happens. In the mirror my back is also really looking more defined.[CSVLB]I have been trying to get my cals up consistently thru this log. Yesterday I was probably a little over 2700 in actuality, and today I will be over that as well. But I swear my pants are fitting looser and my abs look even better. Before this I was holding between 2300 and 2400 as maintenance cals.

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3out of 5yshrov–The worst that can happen is, you'll get bubble guts.and off to the toilet you go. LOL![CSVLB]Anyone have an inovative method of ingesting this crap. I can't just throw it back, makes me yak.[CSVLB]Originally posted by Scorpio

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3out of 5kapjicoh–Now I know it's happened to me and I'm sure to others when you open a container of protein and it smells incredibly delicious and you

3out of 5wermyt–In April, I will be switching to Phenorex as the fat loss agent. Will also be increasing calories a bit each week to get back to around 3500 cals per day and will be monitoring bodyfat weekly at that point. If it starts creeping the wrong way, will adjust calories/cardio as needed.

5out of 5igorfan1–308 is 35 of 880)

4out of 5voronokrus–Bob, BH does have a point in that a bunch of short term goals may be the best way to approach things after the surgery? I am getting a little worried myself since my frequency at night has started to go back up.

4out of 5maverick296–I recently got the Jack3d (watermellon I started with taking 1 scoop for the first few days than increased up to 2 scoops i still feel no difference in my workout from it today i boosted up to 3 scoops but still nothing FML I saw the Micro at the store too which was a bit more expencive so i was wondering if anyone knows if its any better than the regular Jack3d?[CSVLB]I recently got the Jack3d (watermellon I started with taking 1 scoop for the first few days than increased up to 2 scoops i still feel no difference in my workout from it today i boosted up to 3 scoops but still nothing FML I saw the Micro at the store too which was a bit more expencive so i was wondering if anyone knows if its any better than the regular Jack3d?

5out of 5Da6puk–Did PA say it was a bad idea to esterify, period. Or just with the EC ?[CSVLB]from the horses mouth:

5out of 5chaoslord21–Set 6 : 115.0x5

3out of 5sonik1006–i definately dont trust weider

5out of 5iamtoolooser–i would have thought that they would be more concerned about locking out the knees at the top of the squat if they had constant tension in mind.

5out of 5pipison33–4 egg whites, scrambled with a little bit smoked salmon

3out of 5arxangil1990–I agree. It is supposed to be minimally suppressive but I get shut down pretty easily so we will see. My PCT will be logged as well but I'll throw in some extra goodies with that too ;)[CSVLB]8-10th dose of 3-AD

4out of 5vrsnake–Don't see why it should. Conduct an experiment. Don't use it, does it hurt? Use it does it hurt?