APS » PROLA » Phys. Rev. C » Volume 63 » Issue 6
< Previous article | Next article >

Phys. Rev. C 63, 065805 (2001) [7 pages]

Production of A=6,7 nuclides in the α+α reaction and cosmic ray nucleosynthesis

Download: PDF (100 kB) or Buy this Article (Use Article Pack) Export: BibTeX or EndNote (RIS)

David J. Mercer1,2 *, Sam M. Austin2,3 †, J. A. Brown2 ‡, S. A. Danczyk2,3, S. E. Hirzebruch2, J. H. Kelley2,3 §, T. Suomijärvi2,4, D. A. Roberts5, and T. P. Walker6
1Nuclear Physics Laboratory, University of Colorado, Boulder, Colorado 80309-0446
2National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824
3Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824
4Institute de Physique Nucléaire, IN2P3-CNRS, F-91406 Orsay, France
5Department of Physics, University of Michigan, Ann Arbor, Michigan, 48109
6Department of Physics, The Ohio State University, Columbus, Ohio 43210

Received 1 October 2000; published 15 May 2001

Cross sections for production of 6He, 6Li, 7Li, and 7Be in the α+α reaction were measured at bombarding energies of 159.3, 279.6, and 619.8 MeV and are found to decrease rapidly with increasing energy. These cross sections are essential for the calculation of the rate of nucleosynthesis of the lithium isotopes in the cosmic rays and thereby play a key role in our understanding of the synthesis of Li, Be, and B. The results for 6Li differ significantly from the tabulated values commonly used in cosmic ray production calculations and lead to lower production of 6Li.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.63.065805
DOI: 10.1103/PhysRevC.63.065805
PACS: 26.40.+r, 25.55.-e, 25.60.Pj, 27.20.+n

* Present address: NIS-5 Group, LANL, Los Alamos, NM 87545; electronic address: mercer@lanl.gov
† Electronic address: austin@nscl.msu.edu
‡ Present address: Physics Department, Millikin University, Decatur, IL 62522.
§ Present address: Department of Physics, North Carolina State University, Raleigh, NC 27695.

[ Abstract  |  Previous article  |  Next article  |  Issue 6 ]