Further Studies of BURSTS and Spallation in High-Energy Heavy Ion Reactions

R. Hashemi-Nezhad, R. Brandt, V. Ditlov, M. Haiduc, E. Firu, A. Neagu, E. Ganssauge, W. Westmeier
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引用次数: 0

Abstract

Aspects of BURSTS and Spallation reactions induced by high-energy heavy ions in thick targets (>10 cm thick) will be investigated: BURSTS are reviewed from a historical and phenomenological point-of-view. Details of interactions in nuclear emulsions will be compared for irradiations of 72 GeV 22Ne-ions from Dubna with irradiations of 72 GeV 40Ar-ions from Berkeley. Measured correlations in individual interactions between multiplicities of “minimum ionizing particles”, ns, and “black prongs”, nb, will be shown as “ns-vs.-nb” per event for BURSTS and separately for Spallation in interactions of 72 GeV 22Ne-ions. Monte Carlo calculations, based on the MCNPX 2.7 code, have been carried out for 72 GeV 22Ne interacting in nuclear emulsions: The correlation between ns and nb in Spallation reactions could be understood. However, “ns-vs.-nb” correlations from BURST-interactions could not be reproduced with this model for events with small numbers of heavy prongs nh ≤ 10. For large numbers of heavy prongs with nh > 10 one could find some agreement between experiments and calculations, however, not in all details. Further experimental and theoretical studies are necessary before one has a complete understanding of BURST interactions in high-energy heavy ion reactions.
高能重离子反应中爆发和散裂的进一步研究
将对厚靶(>10cm厚)中高能重离子引发的BURSTS和散裂反应进行研究:从历史和现象学的角度对BURSTS进行了回顾。将比较来自Dubna的72 GeV 22Ne离子辐照与来自Berkeley的72 GeV-40Ar离子辐照的核乳液中相互作用的细节。在72 GeV 22Ne离子相互作用中,“最小电离粒子”ns和“黑叉”nb的多重性之间的单个相互作用的测量相关性将显示为每个事件的“ns-vs.-nb”。基于MCNPX 2.7程序,对核乳液中72 GeV 22Ne相互作用进行了蒙特卡罗计算:可以理解散裂反应中ns和nb之间的相关性。然而,对于少量重叉nh≤10的事件,该模型无法再现BURST相互作用的“ns-vs.-nb”相关性。然而,对于大量nh>10的重尖头,实验和计算之间可能存在一些一致性,但并非所有细节都一致。在完全理解高能重离子反应中的BURST相互作用之前,需要进行进一步的实验和理论研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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