Analysis of inclusive (d,xp) reactions on nuclei from 9Be to 238U at 100MeV
Analysis of inclusive (d,xp) reactions on nuclei from 9Be to 238U at 100MeV
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100MeV 下 9Be 到 238U 原子核的包容性 (d,xp) 反应分析
DOI：
10.1103/physrevc.84.054606
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Masanobu Yahiro
中科院分区：
文献类型：
--
作者：
Tao Ye;Shintaro Hashimoto;Yukinobu Watanabe;Kazuyuki Ogata;Masanobu Yahiro
使用弹性破裂过程的连续离散耦合通道理论和中子剥离过程的格劳伯模型，分析了入射能量为 100 MeV 时 Be、C、Al、Ni、Nb、Ta、Pb 和 U 上氘核诱发反应的包容性质子发射，以研究大范围目标质量数下的氘核破裂过程。考虑库仑相互作用的影响，以正确描述前向角的质子发射。此外，唯象移动源模型用于估计包容光谱中的蒸发和预平衡分量。该计算很好地再现了在前向角小于 20° 的轻核和中核实验光谱中观察到的约一半入射能量的显着凹凸，而随着目标原子序数的增加，该计算低估了凹凸分量。这种低估可能是由于格劳伯模型中使用的 eikonal 近似由于强库仑相互作用而变得更差。结果表明，中子剥离过程的格劳伯模型计算通过用光学模型计算给出的量子相移替换随观相移，可以改善这种差异。
Inclusive proton emissions from deuteron-induced reactions onBe,C,Al,Ni,Nb,Ta,Pb, andU at an incident energy of 100 MeV are analyzed using the continuum discretized coupled-channels theory for the elastic-breakup process and the Glauber model for the neutron-stripping process in order to investigate deuteron-breakup processes over a wide range of target mass numbers. The effects of Coulomb interactions are taken into account to give a proper description of proton emissions at forward angles. Moreover, the phenomenological moving-source model is used to estimate evaporation and preequilibrium components in inclusivespectra. The calculation reproduces fairly well a prominent bump observed around half the incident energy in experimentalspectra for light and medium nuclei at forward angles of less than 20whereas the calculation underestimates the bump component as the target atomic number increases. The underestimation is likely due to the fact that the eikonal approximation used in the Glauber model becomes worse due to strong Coulomb interactions. It is shown that the Glauber-model calculation for the neutron-stripping process leads to an improvement of this discrepancy by substituting the eikonal phase shift for the quantum phase shift given by the optical-model calculation.