Sentences with phrase «isotope decay rates»
Sedimentary layers, stalact.ites, water erosion over time, ice core data, tree rings, isotope decay rates.
http://religion.blogs.cnn.com/ Not exact matches
But it is not, the same principles that make semiconductors work as predicted make isotopes decay at a predictable rate.
Some isotopes that existed when the Solar System formed are radioactive and have decay rates that caused them to become extinct within tens to hundreds of million years.
Animal cells take up carbon - 14 when they are formed, and because the decay rate of carbon - 14 is known, the time of death can be deduced from the amount of isotope left.
«We developed three independent age - dating techniques that are based on the different decay rates of radium, thorium and lead isotopes.
Krypton dating is much like the more - heralded carbon - 14 dating technique that measures the decay of a radioactive isotope — which has constant and well - known decay rates — and compares it to a stable isotope.
Scientists agree that tritium, a radioactive isotope of hydrogen, is key to obtaining a precise measurement: As a gas, tritium decays at such a rate that scientists can relatively easily observe its electron byproducts.
Experiments that measure the rate of antineutrino production from the decay of uranium and plutonium isotopes have so far produced results roughly consistent with this theory.
(All organisms take in carbon - 14, a rare radioactive isotope, while they are living; when they die, the carbon decays at a steady rate.
Using the known decay rates of various radioactive isotopes, he investigates the chronology of early processes on small planetary objects and studies the chemical and physical aspects of old and young crust - forming processes on Earth.
The cause of the heating can not be long - lived radioisotopes; given the primordial concentrations of the isotopes and the expected rate of heat loss, calculations show that the radioactive decay could not have melted Vesta or any other asteroid.
Two major dating methods applied to artifacts and fossils are stratagraphic dating (based upon the particular layer of rock of sediment in which the object is found) or radiometric dating (which is based on the decay rates of certain radioactive isotopes).
The technique hinges on carbon - 14, a radioactive isotope of the element that, unlike other more stable forms of carbon, decays away at a steady rate.
2) Since the system is linear, the decay rate of each isotope individually is the same as the decay rate of all the others.
There's weird crap happening far out in the solar system on Voyager and Pioneer spacecraft not being at the position and velocity where theory says they should be and radiothermal power supplies not decaying at rates predicted upon what are axiomatically constant radioactive decay rate of the isotopes like it isn't really a constant at all.