Details

Autor(en) / Beteiligte

• Ouellet, J M L
• Evans, H C
• Lee, H W
• Leslie, J R
• MacArthur, J D
• McLatchie, W
• Mak, H-B
• Skensved, P
• Whitton, J L
• Zhao, X

Titel

C-12(alpha, gamma)O-16 cross sections at stellar energies

Ist Teil von

• Physical review letters, 1992-09, Vol.69 (13), p.1896-1899

Erscheinungsjahr

1992

Quelle

PROLA

Beschreibungen/Notizen

• The excitation function of the C-12(alpha, gamma)O-16 reaction and the angular distribution of its gamma rays were measured at nine energies ranging from E(c.m.) = 1.37 to 2.98 MeV. These measurements allowed the separation of the E1 and E2 contributions and their extrapolation to the region of astrophysical interest. The analysis of the E1 cross sections with a three-level R-matrix method yields a prediction of 1 + 6 or -1 keVb for the S factor at E(c.m.) = 0.3 MeV. The contribution of E2 transitions at the same energy is 40 +/- 7 keVb from a cluster-model analysis of the present data. (Author)