The team also used secondary ion mass spectrometry to determine the concentration of helium within their samples. “We also performed first-principles calculations to support experimental findings,” ...

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long-standing debate over how our planet formed. Primordial helium from the ...

This method likely prevented the escape of helium during the measurement phase, Hirose said in a statement. This artificially colored image made using a technique called secondary ion mass ...