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HK: Physik der Hadronen und Kerne

HK 18: Nuclear and Particle Astrophysics II

HK 18.3: Vortrag

Dienstag, 12. März 2002, 17:30–17:45, C

Resonance strengths for the reaction ²⁸Si(α,γ)³²S at low energies — •M. Babilon, T. Hartmann, C. Hutter, P. Mohr, K. Sonnabend, K. Vogt, S. Volz, and A. Zilges — Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstrasse 9, D-64289 Darmstadt, Germany

Silicon burning is supposed to be the dominant mechanism for element synthesis in the mass range A = 28-65. Capture reactions like (α,γ), (p,γ), (n,γ) and the inverse photodisintegration processes are involved [1].
During a calibration of a Compton polarimeter [2] γ-decays of eight resonances in the ²⁸Si(α,γ)³²S reaction have been studied. The results for resonance strengths and decay branches from previous measurements [3-5] were verified, and in several cases the uncertainties in resonance strengths could be significantly reduced.
^* supported by the DFG (contracts Zi510/2-1 and FOR272/2-1)

[1] C. E. Rolfs, W. S. Rodney, ”Cauldrons in the Cosmos” (1988)

[2] C. Hutter et al., this conference

[3] D. W. O. Rogers el al., Nucl. Phys. A281, 345 (1977)

[4] J. W. Toevs el al., Nucl. Phys. A172, 589 (1971)

[5] P. J. M. Smulders el al., Physica 30, 1197 (1964)