Scientists found an unexpected nuclear energy shift in radioactive lanthanum isotopes, challenging existing models and ...

Researchers at the Accelerator Laboratory of the University of Jyväskylä, Finland, precisely measured atomic masses of radioactive lanthanum isotopes and found an interesting feature in their nuclear ...

Unlike most supernovae, this one spewed lots of elements far heavier than iron, including radioactive thorium and uranium. For Frebel, this was a lucky star indeed. Since these radioactive ...

that are lighter than superheavy elements but still heavier than iron. "It's not certain, but people think that all of the gold on Earth was made in neutron star collisions," Sherrill said.

The mystery arose more than 20 years ago ... stars didn't have planets because there was a lack of heavier elements, such as carbon and iron, which are created by stars' nuclear fusion and ...