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Phys. Rev. C 46, R833–R837 (1992)

β-delayed proton decay of 20Mg and its astrophysical implications

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J. Görres, M. Wiescher, and K. Scheller
Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556

D. J. Morrissey
National Superconducting Cyclotron Laboratory, and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824

B. M. Sherrill
National Superconducting Cyclotron Laboratory, and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824

D. Bazin and J. A. Winger
National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824

Received 11 May 1992; published in the issue dated September 1992

We have studied the β-delayed proton decay of 20Mg to search for the 2645 keV state in 20Na. This state is of astrophysical interest, because any proton capture through this state would dominate the stellar reaction rate of the reaction 19Ne(p,γ)20Na. This reaction determines the break out from the hot CNO cycle. Several proton groups have been observed and their logft values have been determined. No protons from the 2645 keV state were seen and a lower limit of logft≥5.85 has been established. The impact of this result on the 19Ne(p,γ) rate is discussed.

© 1992 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.46.R833
DOI:
10.1103/PhysRevC.46.R833
PACS:
23.40.-s, 23.90.+w, 27.30.+t, 97.10.Cv
 
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