was less than the atomic mass (average mass of the atom). For example, a helium atom has an atomic mass of 4, but an atomic number (or positive charge) of 2. Since electrons have almost no mass ...

High-angle toroidal dark field scanning TEM (HAADF-STEM) images further demonstrate the successful synthesis of catalysts at different Fe-Rh atomic distances. X-ray photoelectron spectroscopy (XPS ...

Researchers at the China Institute of Atomic Energy (CIAE ... utilized a refined accelerator mass spectrometry (AMS) technique to detect 60 Fe, a rare isotope produced by supernovae and found ...