Related Experiment Video
Updated: Aug 21, 2026

A Study of the Complexation of Mercury(II) with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry
Published on: January 8, 2016
The mass of 22Mg
M Mukherjee1, A Kellerbauer, D Beck
1GSI, Planckstrasse 1, 64291 Darmstadt, Germany.
Abstract:
Mass measurements with a relative precision of better than 1.5 x 10(-8) were performed on 22Mg and its reaction partners 21Na and 22Na with the ISOLTRAP Penning trap mass spectrometer at CERN, yielding the mass excesses D(22Mg)=-399.92(27) keV, D(21Na)=-2184.71(21) keV, and D(22Na)=-5181.56(16) keV. The importance of these results is twofold. First, a comparative half-life (Ft value) has been obtained for the superallowed beta decay of 22Mg to further test the conserved-vector-current hypothesis. Second, the resonance energy for the 21Na proton capture reaction has been independently determined, allowing direct comparisons of observable gamma radiation in nova explosions with the yield expected from models.
Related Concept Videos
Molar Mass
Atomic Weight
Atomic Mass
Formula Mass and Mole Concepts of Compounds
High-Resolution Mass Spectrometry (HRMS)
Mass Spectrum: Interpretation

