Helium atom precision measurements ... theorists discovered that the fine-structure split (23P0-23P2) of the 23P energy level of helium is the best atomic system for measuring the fine structure ...

An international research team led by the Paul Scherrer Institute PSI has measured the radius of the nucleus of muonic helium ...

A research team has achieved a significant breakthrough in determining fundamental properties of atomic nuclei. The team conducted laser spectroscopy experiments on muonic helium-3. Muonic helium-3 is ...

Elements are arranged in the periodic table in order of increasing atomic number. For example hydrogen has the atomic number of one, helium two ... 2,8,1. An atom of sodium has 11 electrons.

The wavelength of these yellow lines is directly related to the energy levels of the sodium atom, and in this way spectroscopy opens a window onto atomic structure. The study of the spectra of the two ...

To find the gradient of a curve, draw a tangent and divide the change in power output by the change in time. The total atomic (proton ... also be described as a Helium nucleus.

The basic atomic structure of Helium-4 vs Helium-3. Helium-3 is a 'stable isotope', meaning that it has a different number of neutrons than the typical atom of that element, and it will never ...