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arXiv 0907.0531nucl-th
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用复标度法计算~ 7 He到~ 6 He的单中子去除强度

One-neutron removal strength of 7He into 6He using the complex scaling method

Takayuki Myo, Ryosuke Ando, Kiyoshi Kato

摘要:

研究了~ 7 He基态的单中子去除强度,为我们提供了~ 7 He中的~ 6 He-n分量。He同位素是在4 He +Xn(X= 1,2,3)团簇模型的基础上描述的。在正确的粒子衰变边界条件下,复标度法不仅能描述价中子的伽莫夫共振态,而且能描述价中子的非共振连续态。采用复标度格林函数计算了~ 7 He到~ 6 He非束缚态的单中子去除强度,其中采用了一组复标度的~ 4 He +n+n态.使用这个框架,我们调查共振和非共振贡献的强度,分别产生特定的结构中的分布。此外,我们还提出了一种利用伽莫夫态光谱因子的复值来获得实值强度的方法。结果表明,6 He(2+)共振的贡献最大。

英文摘要:

We study the one-neutron removal strength of the 7He ground state, which provides us with the 6He-n component in 7He. The He isotopes are described on the basis of the 4He+Xn cluster model (X=1,2,3). The complex scaling method is applied to describe not only the Gamow resonances but also the nonresonant continuum states of valence neutrons, with the correct boundary condition of particle decays. The one-neutron removal strength of 7He into the unbound states of 6He is calculated using the complex-scaled Green's function, in which a complex-scaled complete set of 4He+n+n states is adopted. Using this framework, we investigate resonant and nonresonant contributions of the strength, which individually produce specific structures in the distributions. In addition, we propose a method to obtain the real-value strength using the complex values of spectroscopic factors of Gamow states. As a result, the 6He(2+) resonance is found to give the largest contribution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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