More accurate measurement of the atomic mass of the electron

2014/03/01 Elhuyar Zientziaren Komunikazioa Iturria: Elhuyar aldizkaria

• Fisika

The measurement was carried out at the Max-Planck Institute of Nuclear Physics and was performed with the maximum precision of the atomic mass of the electron: 0,0005485799067(14)(9)(2) u (united atomic mass unit). The numbers in brackets are values of statistical, systematic and theoretical uncertainties. This measure is 13 times more accurate than the previous one. The previous value was 0.00054857990943(23) or awarded by the CODATA Commission of the International Council of Science in 2006.

It has been reported in the journal Nature. Edmund G of the University of Florida. The physicist Muyers said that "the new measurement will allow to test more accurately the Standard Particle Model, with an accuracy of more than one million million."

Researchers at the Max-Planck Institute have deduced the new value of the atomic mass of the spin electron from an electron associated with a carbon core (carbon is the reference atom of atomic mass; an atomic mass unit is the twelfth part of the atomic mass of C-12).