München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 51: Kern- und Teilchen-Astrophysik

HK 51.3: Vortrag

Donnerstag, 23. März 2006, 17:30–17:45, E

The ¹⁵N(p,α)¹²C reaction reexamined at astrophysical energies — •Daniel Bemmerer^1,2, Peter Heide¹, Rolf Hellhammer¹, and Falk Reinhardt¹ — ¹Institut für Atomare Physik und Fachdidaktik, Technische Universität Berlin, Germany — ²Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Italy

The branching between the ¹⁵N(p,γ)¹⁶O and the ¹⁵N(p,α)¹²C reactions determines the relative rate of the hydrogen burning CNO cycles I and II, respectively. As a first step for a new measurement of the ¹⁵N(p,α₀)¹²C cross section at astrophysical energies, angular distributions have been measured for E = 60–140 keV. The prospectives for a future direct, absolute measurement of this cross section at energies of stable hydrogen burning in stars will be discussed.