R-matrix analysis of interference effects in 12C(α,α)12C and 12C(α,γ)16O -: art. no. 064611

被引：55
|
作者：
Angulo, C [1 ]
Descouvemont, P
机构：
[1] Catholic Univ Louvain, Ctr Rech Cyclotron, B-1348 Louvain, Belgium
[2] Free Univ Brussels, B-1050 Brussels, Belgium
来源：
PHYSICAL REVIEW C | 2000年 / 61卷 / 06期
关键词：
D O I：
10.1103/PhysRevC.61.064611
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The alpha+C-12 d phase shift and the C-12(alpha,gamma)O-16 E2 S factor are analyzed in the R-matrix theory. A new method is proposed to link experimental and calculated parameters within the R-matrix formalism. We show that interference patterns in the phase shift near 3 MeV are very helpful to constrain the parameter set. Starting from this analysis, we fit the C-12(alpha,gamma)O-16 E2 S factor, and find low-energy values larger than currently accepted. Different interference patterns are found, but do not appear to affect the astrophysical energies. Consequently, direct measurements at low energies are necessary for astrophysical applications.
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页数：7
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