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Title:
The Mass of 22Mg
Authors:
Mukherjee, M.; Kellerbauer, A.; Beck, D.; Blaum, K.; Bollen, G.; Carrel, F.; Delahaye, P.; Dilling, J.; George, S.; Guénaut, C.; Herfurth, F.; Herlert, A.; Kluge, H.-J.; Köster, U.; Lunney, D.; Schwarz, S.; Schweikhard, L.; Yazidjian, C.
Affiliation:
AA(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AB(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AC(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AD(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AE(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AF(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AG(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AH(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AI(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AJ(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AK(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AL(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AM(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AN(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AO(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AP(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AQ(GSI, Planckstrasse 1, 64291 Darmstadt, Germany), AR(GSI, Planckstrasse 1, 64291 Darmstadt, Germany)
Publication:
Physical Review Letters, vol. 93, Issue 15, id. 150801 (PhRvL Homepage)
Publication Date:
10/2004
Origin:
APS
PACS Keywords:
Binding energies and masses, Weak-interaction and lepton aspects, Nucleosynthesis in novae supernovae and other explosive environments, 20<, =A<, =38
DOI:
10.1103/PhysRevLett.93.150801
Bibliographic Code:
2004PhRvL..93o0801M

Abstract

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 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.
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