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Phys. Rev. Lett. 87, 142501 (2001) [4 pages]

Breakdown of the Isobaric Multiplet Mass Equation at A  =  33, T  =  3/2

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F. Herfurth1,3 *, J. Dilling1, A. Kellerbauer2,5, G. Audi4, D. Beck6,1, G. Bollen3,8, H.-J. Kluge1, D. Lunney4, R. B. Moore5, C. Scheidenberger1, S. Schwarz2,8, G. Sikler1, J. Szerypo7, and ISOLDE Collaboration2
1GSI, Planckstraße 1, D-64291 Darmstadt, Germany
2CERN, CH-1211 Geneva 23, Switzerland
3Sektion Physik, Ludwig-Maximilians Universität München, D-85748 Garching, Germany
4CSNSM-IN2P3-CNRS, F-91405 Orsay-Campus, France
5Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada
6Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
7Department of Physics, University of Jyväskylä, PB 35 (Y5), FIN-40351 Jyväskylä, Finland
8National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321

Received 6 November 2000; published 13 September 2001

Mass measurements on 33,34,42,43Ar were performed using the Penning trap mass spectrometer ISOLTRAP and a newly constructed linear Paul trap. This arrangement allowed us, for the first time, to extend Penning trap mass measurements to nuclides with half-lives below one second ( 33Ar: T1/2  =  174 ms). A mass accuracy of about 10-7 (δm≈4 keV) was achieved for all investigated nuclides. The isobaric multiplet mass equation was checked for the A  =  33, T  =  3/2 quartet and found to be inconsistent with the generally accepted quadratic form.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.87.142501
DOI: 10.1103/PhysRevLett.87.142501
PACS: 21.10.Dr, 07.75.+h, 27.30.+t, 32.10.Bi

* Corresponding author. Present address: CERN EP/SC, 1211 Geneva 23, Switzerland. Email address: Frank.Herfurth@cern.ch

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