New γ-ray measurements forC12+C12sub-Coulomb fusion: Toward data unification
New γ-ray measurements forC12+C12sub-Coulomb fusion: Toward data unification
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C12+C12亚库仑聚变的新 γ 射线测量：迈向数据统一
DOI：
10.1103/physrevc.73.064601
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发表时间：
2006
影响因子：
3.1
通讯作者：
M. Wiescher
中科院分区：
文献类型：
--
作者：
E. F. Aguilera;P. Rosales;E. Martinez;G. Murillo;M. Fernandez;H. Berdejo;D. Lizcano;A. Gómez;R. Policroniades;A. Varela;E. Moreno;E. Chávez;M. E. Ortiz;A. Huerta;T. Belyaeva;M. Wiescher
测量了{sup 12}C+{sup 12}C系统在质心能量为4.42 ~ 6.48 MeV，能量阶跃为75 keV的聚变中{alpha}、p和n蒸发通道的聚变激发函数。{伽马}射线技术与一种新的绝对归一化方法一起使用，该方法独立于电荷收集，允许同时监测目标处的碳积累。以前的作品之间的差异进行了讨论，并提出了一个简单的统一。势垒穿透模型（BPM）的计算是一致的腹部到腹部的扁变形{sup 12}C核在接触点的取向。如在以前的作品中，看到很多结构的激发函数，这是几乎一致的文献中报道的共振位置，该系统。使用BPM预测的背景激发函数，并在测量的能量区域进行相关的Breit-Wigner项的同时拟合，产生了一组修改后的共振参数。根据统一的观测数据，讨论了天体物理S因子向低能的外推。
Fusion excitation functions are measured for the {alpha},p, and n evaporation channels in the fusion of the {sup 12}C+{sup 12}C system at center-of-mass energies between 4.42 and 6.48 MeV, with energy steps of 75 keV. The {gamma}-ray technique is used with a new absolute normalization method which is independent of charge collection, allowing one to monitor at the same time the carbon buildup at the target. Discrepancies between previous works are discussed and a simple unification is proposed. Barrier penetration model (BPM) calculations are consistent with a belly-to-belly orientation of the oblate deformed {sup 12}C nuclei at the touching point. As in previous works, much structure is seen in the excitation function which is nearly consistent with the positions of resonances reported in the literature for this system. Using BPM predictions for the background excitation function and doing a simultaneous fit of the relevant Breit-Wigner terms in the measured energy region produced a modified set of resonance parameters. The extrapolation of the astrophysical S factor to lower energies is discussed on the basis of the unified data.