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arXiv 2004.14612nucl-thnucl-ex
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使用连续离散耦合通道计算从破裂截面确定弱束缚核的$B(E1)$分布。$^{11}$ Be的应用

Determining $B(E1)$ distributions of weakly bound nuclei from breakup cross sections using Continuum Discretized Coupled Channels calculations. Application to $^{11}$Be

A. M. Moro, J. A. Lay, J. Gómez-Camacho

摘要:

提出了一种从库仑离解实验数据中提取弱束缚核$B(E1)$强度的新方法。该方法利用连续离散耦合通道(CDCC)的计算,其中核力和库仑力都考虑到所有的订单。相对于基于等效光子法(Equivalent Photon Method,简称EMT)的标准程序,这是一个至关重要的优势,因为EMT没有正确考虑核畸变、高阶耦合效应或库仑核干扰项。该程序适用于$^{11}$ Be核使用两套可用的实验数据在不同的能量,其中似乎不兼容的$B(E1)$已报告使用的ESTA。我们表明,本程序提供一致的$B(E1)$强度,从而解决了上述长期存在的两个测量之间的差异。

英文摘要:

A novel method to extract the $B(E1)$ strength of a weakly bound nucleus from experimental Coulomb dissociation data is proposed. The method makes use of continuum discretized coupled channels (CDCC) calculations, in which both nuclear and Coulomb forces are taken into account to all orders. This is a crucial advantage with respect to the standard procedure based on the Equivalent Photon Method (EPM) which does not properly take into account nuclear distortion, higher order coupling effects, or Coulomb-nuclear interference terms. The procedure is applied to the $^{11}$Be nucleus using two sets of available experimental data at different energies, for which seemingly incompatible $B(E1)$ have been reported using the EPM. We show that the present procedure gives consistent $B(E1)$ strengths, thus solving the aforementioned long-standing discrepancy between the two measurements.

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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