Abstract

Detonation of PETN and HMX with a particle size of about 1 \(\mu\)m was investigated by an electromagnetic method. At an initial density of 0.9–1.2 g/cm³, the von Neumann spike was either weak or not observed at all. This indicates a fast reaction whose time is outside the experimental resolution (about 5 ns). Electrical conductivity measurements provided only a rather rough upper-bound estimate of the reaction time (less than tens of nanoseconds). Density measurements using synchrotron radiation showed that the initiation of PETN with an air shock wave led to an almost instantaneous initiation of detonation, without an acceleration stage. In general, the results of the study confirm that the chemical reaction rate in ultrafine explosives is increased.

中文翻译：

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超细炸药的爆炸

摘要

通过电磁方法研究了粒径约为 1 \(\mu\) m的 PETN 和 HMX 的爆炸 。在 0.9–1.2 g/cm ³的初始密度下，冯诺依曼尖峰要么很弱，要么根本没有观察到。这表明其时间超出实验分辨率（约 5 ns）的快速反应。电导率测量仅提供了一个相当粗略的反应时间上限估计（小于几十纳秒）。使用同步加速器辐射的密度测量表明，用空气冲击波引发 PETN 导致几乎瞬间引发爆炸，而没有加速阶段。总的来说，研究结果证实了超细炸药的化学反应速率增加。