12C\(α,γ\)16O: The Key Reaction in Stellar Nucleosynthesis

Details 12C\(α,γ\)16O: The Key Reaction in Stellar Nucleosynthesis 12C\(α,γ\)16O: The Key Reaction in Stellar Nucleosynthesis

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001phrvl..86.3244k&link_type=abstract

Physical Review Letters, vol. 86, Issue 15, pp. 3244-3247

Physics

47

Scientific paper

The angular distributions of γ rays from the 12C\(α,γ\)16O reaction have been measured at 20 energy points in the energy range Ecm = 0.95 to 2.8 MeV. The sensitivity of the present experiment compared to previous direct investigations was raised by 1-2 orders of magnitude, by using an array of highly efficient ( 100%) Ge detectors shielded actively with BGOs, as well as high beam currents of up to 500 μA that were provided by the Stuttgart Dynamitron accelerator. The SE1 and SE2 factors deduced from the γ angular distributions have been extrapolated to the range of helium burning temperatures applying the R-matrix method, which yielded S300E1 = \(76+/-20\) keV b and S300E2 = \(85+/-30\) keV b.

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