The Mass of <SUP>22</SUP>Mg

doi:10.1103/PhysRevLett.93.150801

The Mass of ²²Mg

Mass measurements with a relative precision of better than 1.5×10^-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 βべーた 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 γがんま radiation in nova explosions with the yield expected from models.

Publication:

Physical Review Letters

Pub Date:

October 2004

DOI:

10.1103/PhysRevLett.93.150801

Bibcode:

2004PhRvL..93o0801M

Keywords:

21.10.Dr;
23.40.Bw;
26.30.+k;
27.30.+t;
Binding energies and masses;
Weak-interaction and lepton aspects;
Nucleosynthesis in novae supernovae and other explosive environments;
20<
=A<
=38

NASA/ADS

The Mass of 22Mg

Abstract

The Mass of ²²Mg