Matter is composed of chemical elements mainly created in stars via nuclear reactions and complex nuclear reaction networks. To understand these processes, we need to know properties of participating ...

Thank you for bringing to my attention the recent International Union of Pure & Applied Chemistry report “Atomic weights of the elements 2009” (C&EN, Dec. 20 ...

The first stars of the universe were monstrous beasts. Comprised only of hydrogen and helium, they could be 300 times more massive than the sun. Within them, the first of the heavier elements were ...

The origin of heavy elements in our universe is theorized to be the result of neutron star collisions, which produce conditions hot and dense enough for free neutrons to merge with atomic nuclei and ...

FOR the past thirty years, beginning with F. W. Aston's observation of small deviations from his whole-number rule, the mass spectrograph has been used for determining atomic masses. One of the first ...

Precise mass measurements help to refine theoretical models that explain whether or not these waiting points are bypassed and in general, just how fast nuclear reactions proceed during X-ray bursts.

Jeroen C. J. Koelemeij is in the Department of Physics and Astronomy, Vrije Universiteit Amsterdam, Amsterdam 1081, the Netherlands. The mass values for atomic nuclei represent a rich source of ...

(ComicSans/iStock/Getty Images Plus) Every atom of matter in the Universe is built around a nucleus. It's a tightly packed ...

How does one go about measuring the mass of an object? Mass is defined as the amount of matter an object contains. This is very different from weight, of course, as the mass of our object would remain ...

Our body and the matter around us is composed of chemical elements mainly created in stars via nuclear reactions and complex nuclear reaction networks. To understand these processes, we need to know ...