破裂阈异常：色散关系的新表现
核理论
2014-11-18 v3 核实验
摘要
本文指出，在紧束缚核近垒及垒下能区的弹性散射中，表征光学势虚部和实部的能量行为所呈现的通常阈异常，在弱束缚核弹性散射情形下发生了剧烈的定性变化。由于即便在垒下能区也与破裂道强耦合，虚势强度似乎随能量降至天然阈、势垒阈以下而增大，同时实势强度减小。此特征与色散关系一致。本文分析了 Li + Pb 体系以阐明这一新现象。
引用
@article{arxiv.nucl-th/0502011,
title = {Breakup Threshold Anomaly: New Manifestation of the Dispersion Relation},
author = {M. S. Hussein and P. R. S. Gomes and J. Lubian and L. C. Chamon},
journal= {arXiv preprint arXiv:nucl-th/0502011},
year = {2014}
}
备注
7 pages, 2 figures. Only two figures are included in the published version. Figure 2 in the published version contains a sign error in N_I which has been changed here. An Erratum has been submitted to Phys. Rev. C. This error has no consequence on the text