Astrophysical reaction rate for Be 9 formation within a three-body approach
Astrophysical reaction rate for Be 9 formation within a three-body approach
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三体方法中 Be 9 形成的天体物理反应率
DOI：
10.1103/physrevc.90.044304
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发表时间：
2014
影响因子：
3.1
通讯作者：
I. Thompson
中科院分区：
文献类型：
--
作者：
J. Casal;M. Rodr'iguez;J. M. Arias;I. Thompson
用解析变换谐振子方法，用三体方法研究了Borroean核Be($\α+\α+n$)的结构。三体形式对天体物理学中相关的整个温度范围内的辐射俘获反应率提供了准确的描述。在高温下，结果与基于两步顺序过程的计算相匹配。在低温下，粒子无法获得中间的二体共振，三体直接捕获导致比顺序过程更大的反应速率。这些结果支持了具有多个带电粒子系统的方法的可靠性。
The structure of the Borromean nucleus $^9$Be ($\alpha+\alpha+n$) is addressed within a three-body approach using the analytical transformed harmonic oscillator method. The three-body formalism provides an accurate description of the radiative capture reaction rate for the entire temperature range relevant in Astrophysics. At high temperatures, results match the calculations based on two-step sequential processes. At low temperatures, where the particles have no access to intermediate two-body resonances, the three-body direct capture leads to reaction rates larger than the sequential processes. These results support the reliability of the method for systems with several charged particles.