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

Autor(en)

Luke E. Erikson, C Ruiz, Friedhelm Ames, Pierre Bricault, L. R. Buchmann, A A Chen, J Chen, H. Dare, B.S. Davids, Charles A. Davis, Catherine M. Deibel, Marik Dombsky, Scott Foubister, Naomi Galinski, Uwe Greife, U. Hager, A Hussein, D A Hutcheon, Jens Lassen, Lars Martin, D Ottewell, C. V. Ouellet, G Ruprecht, Kiana Setoodehnia, Alan C. Shotter, Andrea Teigelhöfer, Christof Vockenhuber, Christian E. Wrede, Anton Wallner

Abstrakt

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.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

Colorado School of Mines, TRIUMF Canada's National Laboratory for Particle and Nuclear Physics, McMaster University, University of Surrey, Argonne National Laboratory, Thompson Rivers University, University of Northern British Columbia (UNBC), University of Edinburgh, University of Washington

Journal

Physical Review C

Band

81

Anzahl der Seiten

12

ISSN

0556-2813

DOI

https://doi.org/10.1103/PhysRevC.81.045808

Publikationsdatum

2010

Peer-reviewed

Ja

ÖFOS 2012

103005 Atomphysik

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/first-direct-measurement-of-the-mg23pgammaal24-reaction(21a3cbb9-9dac-4541-87ee-f719b564015a).html