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Phys. Rev. Lett. 86, 43–46 (2001)

Decay of a Resonance in 18Ne by the Simultaneous Emission of Two Protons

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J. Gómez del Campo1, A. Galindo-Uribarri1, J. R. Beene1, C. J. Gross1,2, J. F. Liang1, M. L. Halbert1, D. W. Stracener1, D. Shapira1, R. L. Varner1, E. Chavez-Lomeli3, and M. E. Ortiz3
1Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
2Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37831
3Instituto de Física, Universidad Nacional Autónoma de México, México 01000 D.F., México

Received 10 July 2000; published in the issue dated 1 January 2001

Radioactive ion beams of 17F were used to study several resonance states in 18Ne. Clear evidence for simultaneous two-proton emission from the 6.15 MeV state (Jπ = 1-) in 18Ne has been observed with the reaction 17F+1H. Because of limited angular coverage, the data did not differentiate between the two possible mechanisms of simultaneous decay, diproton (2He) emission or direct three-body decay. The two-proton partial width was found to be 21±3eV assuming 2He emission and 57±6eV assuming three-body decay. The total width of the 1- state was measured to be 50±5keV. Several additional resonances that decay by single proton emission were also studied.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.43
DOI:
10.1103/PhysRevLett.86.43
PACS:
25.60.-t, 23.50.+z, 24.30.-v, 25.40.Ny
 
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