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arXiv 0906.4498nucl-th
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用随机平均场论研究传递反应中的质量弥散

Mass dispersion in transfer reactions with a stochastic mean-field theory

Kouhei Washiyama, Sakir Ayik, Denis Lacroix

摘要:

在微观随机场论的框架下,研究了能量低于库仑势垒的对称重离子反应中的核子转移。虽然已知平均场单独大大低估了碎片质量分布的分散度,但在随机平均场论中,分散度得到了相当大的增强。由随机理论导出的碎片质量分布的方差与交换核子数成比例。因此,新的方法提供了第一个完全微观理论与实验数据的唯象分析相一致。

英文摘要:

Nucleon transfer in symmetric heavy-ion reactions at energies below the Coulomb barrier is investigated in the framework of a microscopic stochastic mean-field theory. While mean-field alone is known to significantly underpredict the dispersion of the fragment mass distribution, a considerable enhancement of the dispersion is obtained in the stochastic mean-field theory. The variance of the fragment mass distribution deduced from the stochastic theory scales with the number of exchanged nucleon. Therefore, the new approach provides the first fully microscopic theory consistent with the phenomenological analysis of the experimental data.

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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