[JBW1949]

OK...Thanks...What is the half life of a seivert?
Is it classified as alpha, beta or gamma?

(this is the first time I ever heard of “seiverts”)

[Cementjungle]

What is the half life of a seivert?

4 vlips.

[Tours]

A sievert is a measure of radiation. It is not a radioactive material.

[marktwain]

OK...Thanks...What is the half life of a seivert?
Is it classified as alpha, beta or gamma?

(this is the first time I ever heard of “seiverts”)

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Seiverts refer to dosage, so there are different numbers for alpha, beta, and gamma. 1 Seivert = 100 Rem

As I am sure you know, half lives are specific to various isotopes.

[Tours]

One sievert—the international measurement of radiation exposure—is enough to cause radiation sickness, infertility and cataracts. Exposure to 10 sieverts will lead to person’s death within weeks,

http://www.smithsonianmag.com/smart-news/fukushima-reactor-shows-highest-radiation-level-initial-meltdown-180962050/