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possible. In this application, the ratio of protactinium-231 to thorium-230 is used for radiometric dating of sediments which are up to 175,000 years old...

forms protactinium-231. It has a decay energy of 0.39 MeV. It has a mass of 231.0363043 grams/mole. 232Th is the only primordial nuclide of thorium and...

decays into protactinium-231, which has a half-life of 32,760 years.[citation needed] While uranium is water-soluble, thorium and protactinium are not, and...

table, it lies to the right of actinium, to the left of protactinium, and below cerium. Pure thorium is very ductile and, as normal for metals, can be cold-rolled...

to thorium-234. Next, with a short half-life, 234Th beta decays to protactinium-234. Finally, 234Pa beta decays to 234U. 234U alpha decays to thorium-230...

thorium, protactinium and uranium. He also discovered the phenomena of atomic recoil and nuclear isomerism, and pioneered rubidium–strontium dating....

curium onwards) behave similarly to the lanthanides, the elements thorium, protactinium, and uranium are much more similar to transition metals in their...

discovered". Phys.org. Retrieved 2023-04-12. 14 C is used in radiocarbon dating. Walker, John. "Barely Radioactive Elements". fourmilab.ch. Retrieved 2018-03-09...

into protactinium-231 and then into other products. Uranium-238 is in a separate chain, decaying into a series of elements, including thorium-230. Both...

measure it in uranium-234, −235 and −238, plutonium, polonium, protactinium and thorium. They were not too worried about the plutonium itself; their main...

minerals that contain uranium and thorium can be estimated by measuring the level of helium with a process known as helium dating. Helium at low temperatures...