APS » PROLA » Phys. Rev. C » Volume 64 » Issue 2
< Previous article | Next article >

Phys. Rev. C 64, 025802 (2001) [9 pages]

Spectroscopy of 23Al and 27P using the (7Li,8He) reaction and the implications for 22Na and 26Al nucleosynthesis in explosive hydrogen burning

Download: PDF (243 kB) or Buy this Article (Use Article Pack) Export: BibTeX or EndNote (RIS)

J. A. Caggiano1 *, D. Bazin1, W. Benenson1, B. Davids1, R. Ibbotson1 †, H. Scheit1 ‡, B. M. Sherrill1, M. Steiner1, J. Yurkon1, A. F. Zeller1, B. Blank2, M. Chartier1,5 §, J. Greene3, J. A. Nolen, Jr.3, A. H. Wuosmaa3, M. Bhattacharya4, A. Garcia4, and M. Wiescher4
1National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
2Centre d’Etudes Nucléaires de Bordeaux-Gradignan, F-33175 Gradignan Cedex, France
3Argonne National Laboratory, Argonne, Illinois 60439
4University of Notre Dame, Notre Dame, Indiana 46556
5Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, Tennessee 37831-368

Received 11 July 2000; published 29 June 2001

The proton-rich nuclei 23Al and 27P were studied using the 24Mg(7Li,8He)23Al and 28Si(7Li,8He)27P reactions, respectively. Several energy levels are observed in each nucleus. The mass excess of 23Al was measured to be 6.773(28) MeV and the mass excess of 27P was measured to be -0.670(41) MeV. The first excited state of 23Al has been resolved from the ground state for the first time at an excitation energy of Ex=0.550(20) MeV. The first excited state of 27P has been measured for the first time at an excitation energy of Ex=1.199(19) MeV. The astrophysical implications of these results for the reaction rates of 22Mg(p,γ)23Al and 26Si(p,γ)27P for the nucleosynthesis of 22Na and 26Al in Ne novae will be discussed.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.64.025802
DOI: 10.1103/PhysRevC.64.025802
PACS: 25.70.Hi, 27.30.+t, 26.30.+k

* Present address: Argonne National Laboratory, Argonne, IL 60439.
† Present address: Brookhaven National Laboratory, Upton, NY 11973-5000.
‡ Present address: Max-Planck-Institut für Kernphysik, Heidelberg, Germany.
§ Present address: Centre d’Etudes Nucléaires de Bordeaux-Gradignan, F-33175 Gradignan Cedex, France.

[ Abstract  |  Previous article  |  Next article  |  Issue 2 ]