The Mass of Mg22

M. Mukherjee, A. Kellerbauer, D. Beck, K. Blaum, G. Bollen, F. Carrel, P. Delahaye, J. Dilling, S. George, C. Guénaut, F. Herfurth, A. Herlert, H.-J. Kluge, U. Köster, D. Lunney, S. Schwarz, L. Schweikhard, and C. Yazidjian
Phys. Rev. Lett. 93, 150801 – Published 8 October 2004

Abstract

Mass measurements with a relative precision of better than 1.5×108 were performed on Mg22 and its reaction partners Na21 and Na22 with the ISOLTRAP Penning trap mass spectrometer at CERN, yielding the mass excesses D(Mg22)=399.92(27)   keV, D(Na21)=2184.71(21)keV, and D(Na22)=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 decay of Mg22 to further test the conserved-vector-current hypothesis. Second, the resonance energy for the Na21 proton capture reaction has been independently determined, allowing direct comparisons of observable γ radiation in nova explosions with the yield expected from models.

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  • Received 16 June 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.150801

©2004 American Physical Society

Authors & Affiliations

M. Mukherjee1, A. Kellerbauer2,*, D. Beck1, K. Blaum1,2, G. Bollen3, F. Carrel2, P. Delahaye2, J. Dilling4, S. George5, C. Guénaut6, F. Herfurth1, A. Herlert7, H.-J. Kluge1, U. Köster2, D. Lunney6, S. Schwarz3, L. Schweikhard7, and C. Yazidjian1

  • 1GSI, Planckstraße 1, 64291 Darmstadt, Germany
  • 2Department of Physics, CERN, 1211 Genève 23, Switzerland
  • 3NSCL, Michigan State University, East Lansing, Michigan 48824-1321, USA
  • 4TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
  • 5Institut für Kernphysik, Westfälische Wilhelms-Universität, 48149 Münster, Germany
  • 6CSNSM-IN2P3-CNRS, 91405 Orsay-Campus, France
  • 7Institut für Physik, Ernst-Moritz-Arndt-Universität, 17487 Greifswald, Germany

  • *To whom correspondence should be addressed. Electronic address: a.kellerbauer@cern.ch

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Vol. 93, Iss. 15 — 8 October 2004

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