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Proceedings Paper

Neutron sources in nuclear astrophysics
Author(s): Rino E. Kunz; A. Denker; H. W. Drotleff; M. Grosse; H. Knee; S. Kuechler; Ralf Seidel; M. Soine; J. Wolfgang Hammer
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Paper Abstract

The excitations functions of the reactions 9Be((alpha) ,n)12C, 13C((alpha) ,n)16O, 17O((alpha) ,n)20Ne, 18O((alpha) ,n)21Ne, 21Ne((alpha) ,n)24Mg, 22Ne((alpha) ,n)25Mg, 25Mg((alpha) ,n)28Si and 26Mg((alpha) ,n)29Si have been measured at the 4 MV dynamitron accelerator in Stuttgart, Germany in the energy range of astrophysical interest, and from these S-factor- curves have been determined. Advanced techniques, especially with the windowless gastarget facility Rhinoceros have been applied. For neutron detection NE213 scintillation counters and a long counter like 4(pi) -detector have been used. A sensitivity limit in the range of 10-10b to 10-\11b was reached with these experiments. Using our new experimental results astrophysical reaction rates have been calculated for all reactions except the Mg-reactions. Analytic expressions have been fitted to all reaction rates.

Paper Details

Date Published: 3 March 1995
PDF: 18 pages
Proc. SPIE 2339, International Conference on Neutrons and Their Applications, (3 March 1995); doi: 10.1117/12.204163
Show Author Affiliations
Rino E. Kunz, Univ. Stuttgart (Germany)
A. Denker, Univ. Stuttgart (Germany)
H. W. Drotleff, Univ. Stuttgart (Germany)
M. Grosse, Univ. Stuttgart (Germany)
H. Knee, Univ. Stuttgart (Germany)
S. Kuechler, Univ. Stuttgart (Germany)
Ralf Seidel, Univ. Stuttgart (Germany)
M. Soine, Univ. Stuttgart (Germany)
J. Wolfgang Hammer, Univ. Stuttgart (Germany)

Published in SPIE Proceedings Vol. 2339:
International Conference on Neutrons and Their Applications
George Vourvopoulos; Themis Paradellis, Editor(s)

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