THE C-12(ALPHA,GAMMA)O-16 CROSS-SECTION AT LOW ENERGIES
THE C-12(ALPHA,GAMMA)O-16 CROSS-SECTION AT LOW ENERGIES
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DOI：
10.1071/ph910369
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发表时间：
1991-01-01
期刊：
影响因子：
--
通讯作者：
KAJINO, T
中科院分区：
文献类型：
--
作者：
BARKER, FC;KAJINO, T
辐射俘获反应的截面的R-矩阵公式的开发和应用，以适应最近测得的C-12（α，γ）O-16数据，基态跃迁和级联跃迁通过6.92和7.12兆电子伏的水平。 正确处理通道的贡献是显着的E2级联跃迁。 级联和基态数据的一致拟合表明，通道半径的值大于以前使用的，因此，低能量天体物理S因子的值明显大于最近通过的。
An R-matrix formula for the cross section for radiative capture reactions is developed and applied to fit recently measured C-12(alpha,gamma)O-16 data, for both ground-state transitions and cascade transitions through the 6.92 and 7.12 MeV levels. The correct treatment of the channel contributions is significant for the E2 cascade transitions. Consistent fits of the cascade and ground-state data suggest a value of the channel radius larger than those previously used, and consequently a value of the low-energy astrophysical S-factor appreciably larger than that adopted recently.