Triple-α continuum structure and Hoyle resonance of 12C using the hyperspherical slow variable discretization
Triple-α continuum structure and Hoyle resonance of 12C using the hyperspherical slow variable discretization
复制标题
使用超球面慢变量离散化的 12C 三重 α 连续谱结构和霍伊尔共振
DOI：
10.1103/physrevc.91.014004
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发表时间：
2015
影响因子：
3.1
通讯作者：
P. Descouvemont
中科院分区：
文献类型：
--
作者：
H. Suno;Y. Suzuki;P. Descouvemont
本文发展了一种计算三粒子通过短程势和库仑势相互作用的束缚能谱和连续能谱的方法。我们的方法结合了超球坐标与慢变量离散化方法。采用复吸收势精确描述连续波函数。该方法在原子和分子物理学中是众所周知的。它在这里扩展到核物理，特别强调长程库仑相互作用。应用该方法计算了α粒子模型中的能谱，重点是精确计算了在恒星核合成中起重要作用的窄近阈态的Hoyle共振宽度。我们采用了一个有效的相互作用势，它再现了的能量和宽度，同时加入了一个三体力，以便将能级固定在实验值。我们还通过计算波函数和一维分布函数分析了束缚态和共振态的结构。
We develop a method for calculating the bound and continuum energy spectrum of three particles interacting through both short-range and Coulomb potentials. Our method combines hyperspherical coordinates with the slow variable discretization approach. A complex absorbing potential is employed to describe accurately the continuum wave functions. The method is well known in atomic and molecular physics. It is extended here to nuclear physics, with a special emphasis on the long-range Coulomb interaction. The method is applied to compute the energy spectrum ofin a-particle model, focusing on an accurate calculation of the Hoyle resonance width of the narrow near-thresholdstate, which plays an important role in stellar nucleosynthesis. We employ an effectiveinteraction potential which reproduces both the energy and width of, while a three-body force is added in order to fix theenergy levels at the experimental values. We also analyze the structure of the bound and resonance states by calculating the wave functions and one-dimensional distribution functions.