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Phys. Rev. C 73, 054313 (2006) [7 pages]

Mass of the lowest T=2 state in 32S: A test of the isobaric multiplet mass equation

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S. Triambak1,2, A. García1, E. G. Adelberger1, G. J. P. Hodges1, D. Melconian1, H. E. Swanson1, S. A. Hoedl1, S. K. L. Sjue1, A. L. Sallaska1, and H. Iwamoto1
1Physics Department, University of Washington, Seattle, Washington 98195-1560, USA
2Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA

Received 11 January 2006; published 22 May 2006

We produced the lowest T=2 state in 32S with the 31P(p,γ) reaction and measured the energies of the deexcitation γ rays, obtaining an excitation energy of 12047.96±0.28 keV that disagrees with a previous value of 12045.0±0.4 keV. Our result, together with a recent measurement of the 32Ar mass, makes the A=32 multiplet the most precisely measured T=2 quintet and provides easily the most stringent test of the isobaric multiplet mass equation. A significant violation of the isobaric multiplet mass equation is observed that could be explained by mixing with a nearby T=0 level.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.73.054313
DOI:
10.1103/PhysRevC.73.054313
PACS:
21.10.Dr, 21.10.Hw, 23.20.Lv, 27.30.+t