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Phys. Rev. C 73, 034320 (2006) [10 pages]

Level structure of 21Mg: Nuclear and astrophysical implications

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A. St. J. Murphy*, M. Aliotta, T. Davinson, C. Ruiz†, and P. J. Woods
School of Physics, University of Edinburgh, Mayfield Road, Edinburgh, EH9 3JZ, United Kingdom

J. M. D'Auria
Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada

L. Buchmann, A. A. Chen‡, A. M. Laird§, F. Sarazin**, and P. Walden
TRIUMF, Vancouver, British Columbia V6T 2A3, Canada

B. R. Fulton and J. E. Pearson†
University of York, York, YO10 5DD, United Kingdom

B. A. Brown
National Superconducting Cyclotron Facility, Michigan State University, East Lansing, Michigan 48824, USA

Received 30 November 2005; published 28 March 2006

Resonant elastic scattering of a radioactive 20Na beam incident upon protons in a polyethylene target has been used to probe the level structure of 21Mg above the proton decay threshold. Three states have been observed, and their properties deduced through analysis based on the R-matrix formalism. The results improve and extend previous studies of this nucleus. An estimate of the 20Na(p,γ)21Mg reaction rate, including these new data, suggests this reaction will not play a significant role in explosive hydrogen burning in astrophysical sites such as novae and x-ray bursts.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.73.034320
DOI:
10.1103/PhysRevC.73.034320
PACS:
21.10.-k, 26.30.+k, 26.50.+x, 27.30.+t

*Electronc address: a.s.murphy@ed.ac.uk

†Present address: TRIUMF, Vancouver, BC V6T 2A3, Canada.

‡Present address: McMaster University, Hamilton, ON L8S 4M1, Canada.

§Present address: University of York, York, YO10 5DD, UK.

**Present address: Colorado School of Mines, Golden, CO 80401, USA.

 
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