Theodrule

From the half-lives and atomic masses (the little numbers that determine how many grams a mole weighs), they can calculate the specific activity of each sample.

• ²³⁵U: 7.99 × 10⁴ Bq/g
• ²³⁹Pu: 2.29 × 10⁹ Bq/g
• ²²⁵Ra: 1.44 × 10¹⁵ Bq/g

Yeah, Simon's sample is 600000x more active than Theodore’s, which is a further 3000x more active than Alvin’s. Even though Simon’s sample produces mostly β particles (which are generally about 10 times less destructive), he is clearly the worst here.

Multiply that by the number of grams in the sample and you get the activity of each sample in becquerels.

Now just use a chipmunk body model and estimated distance from each sample to calculate the absorbed dose in grays (not to be confused with equivalent dose measured in sieverts). 70% lethal dose over 30 days is 10~12 Gy for mice so chipmunks should have it similar but take into account that they weigh around 100 g.

Something something half-life decay funny particles radiation you are dead

It is the disintegration chain of each atom and the particules and half life of all.

Half life is the time it takes for half the atoms to disintegrate. The first letter is the emited radiation (alpha, beta, gamma).

You can derived how dangerous each of these materials is from these informations.

On a quick glance, radium should be the deadliest one, because the half lives are all very short, so that's a lot of deadly radiations. On the other hand, uranium is said to be on a critical mass, which could be a chain reaction.

I was gonna say, it looks very much like some funky stuff

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chipmunks on 16 speed

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Holy shit dude,the stories in the comments,tho. But really these munks I could get behind,lol. Definitely better than the crap we got

Your comment above gave the half lives of the main substances and their secondary products, right? Could you recommend any resources for someone to learn how to do what you did above?

The half-life of ²³⁵U is hundreds of millions of years so it is not a concern. However, it will literally become a nuke if too much (a few liters or 60 kg) get too close together.

The half-life of plutonium-239 is tens of thousands of years so only a thousandth will get a chance to hurt Theodore over his lifetime. However, it is probably chemically toxic so it might cause non-radiation poisoning.

Radium-225 will decay in days, and will quickly go through 7 more radioactive reactions, both alpha and beta, before becoming essentially stable bismuth. It is the worst by far.

The plutonium gives off some alpha radiation that won’t hurt you if you don’t eat it.

Breathing in particles of plutonium is the danger.

Because it emits alpha particles, plutonium is most dangerous when inhaled. When plutonium particles are inhaled, they lodge in the lung tissue. The alpha particles can kill lung cells, which causes scarring of the lungs, leading to further lung disease and cancer. Plutonium can enter the blood stream from the lungs and travel to the kidneys, meaning that the blood and the kidneys will be exposed to alpha particles. Once plutonium circulates through the body, it concentrates in the bones, liver, and spleen, exposing these organs to alpha particles. Plutonium that is ingested from contaminated food or water does not pose a serious threat to humans because the stomach does not absorb plutonium easily and so it passes out of the body in the feces.

Radioisotope Brief: Plutonium