评述了近两年多来在重离子耗散反应激发函数研究中新的实验结果与理论进展. 重点介绍27Al+27Al耗散反应产物的长程角度关联以及19F+93Nb耗散反应中截面及其涨落测量的不可重复性.
The experimental study and the theoretical development on the structures of excitation functions in dissipative heavy ion collisions last years were reviewed. Especially the long-range angular correlation in the reaction of 27Al+27Al and the non-reproducibility of the cross sections measured in the reaction of 19F+93Nb were introduced. The experimental results indicate that the angular coherent width in the dissipative heavy ion collision 27Al+27Al is at least 40° and the angular correlation functions show an asymmetry relative to the reference angles. The fact of the non-reproducibility of the cross sections in the two independent measurements of excitation functions for the 19F+93Nb dissipative heavy ion collisions was differed by two target foils and kept other experimental conditions to be identical supports recent theoretical predictions of the extreme sensitivity and chaos in complex quantum collisions.
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