First direct measurement of the Mg-23(p,gamma)Al-24 reaction

L. Erikson, C. Ruiz, F. Ames, P. Bricault, L. Buchmann, A. A. Chen, J. Chen, H. Dare, B. Davids, C. Davis, C. M. Deibel, M. Dombsky, S. Foubister, N. Galinski, U. Greife, U. Hager, A. Hussein, D. A. Hutcheon, J. Lassen, L. MartinD. F. Ottewell, C. V. Ouellet, G. Ruprecht, K. Setoodehnia, A. C. Shotter, A. Teigelhoefer, C. Vockenhuber, C. Wrede, A. Wallner

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The lowest-energy resonance in the Mg-23(p,gamma)Al-24 reaction, which is dominant at classical nova temperatures, has been measured directly for the first time using the DRAGON recoil spectrometer. The experiment used a radioactive Mg-23 beam (mixed within a significantly stronger Na-23 beam) of peak intensity 5 x 10(7) s(-1), at the ISAC facility at TRIUMF. We extract values of E-R = 485.7(-1.8)(+1.3) keV and omega gamma = 38(-15)(+21) meV from our data (all values in the center-of-mass frame unless otherwise stated). In addition, the experiment prompted a recalculation of the Q value for this reaction based on a revision of the Al-24 mass. The effect on the uncertainties in the quantities of ejected Na-22 and Al-26 from oxygen-neon classical novae is discussed.

Original languageEnglish
Article number045808
Pages (from-to)-
Number of pages12
JournalPhysical Review C
Volume81
Issue number4
DOIs
Publication statusPublished - Apr 2010

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