碎裂反应中纵向动量分布的色散
Dispersion of longitudinal momentum distributions induced in fragmentation reactions
摘要：
在系统测量碎裂反应的基础上，详细描述了剩余核的速度分布，并建立了碎裂残余物运动学性质的改进描述。这项工作致力于他们的动量分布的波动。与以前仅限于近射弹碎片的研究不同，我们将研究扩展到整个生产范围，直至观察到的最轻碎片。在这种情况下，除了磨损和蒸发过程的贡献，我们考虑了热破碎的影响的宽度上的动量分布。使用近似的理论描述的不同的反应阶段，一个新的分析公式的动量分布的方差，这是很好地适应于技术应用。
英文摘要：
On the basis of systematic measurements of fragmentation reactions, which provide a detailed overview on the velocity distributions of residual nuclei, an improved description of the kinematical properties of the fragmentation residues is established. This work is dedicated to the fluctuations of their momentum distributions. In contrast to previous investigations, limited to close-to-projectile fragments, we extended our study to the entire production range, down to the lightest observed fragments. In this context, beside the contribution of abrasion and evaporation processes, we considered the effect of the thermal break-up on the width of the momentum distributions. Using approximated theoretical descriptions of the different reaction stages, a new analytical formula for the variance of the momentum distribution is derived, which is well adapted to technical applications.
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