This manuscript investigates reactive- versus hydrodynamic-breakup processes of ejecta. For this study, the reactive metal is cerium (Ce) and the nonreactive metal is tin (Sn), the nonreactive gas is helium (He) and the reactive gas is deuterium (D${}_2$) or hydrogen (H${}_2$). Experiments were performed in vacuum and the reactive- and nonreactive-gases at various pressures, where we endeavored to match the post-shock gas densities to differentiate between reactive- versus hydrodynamic-breakup processes. Hydrodynamic breakup sensitively links to the Weber number (gas density, liquid fragment diameter, surface tension, and the square of the relative velocity between the fragment and the gas), whereas reactive breakup links to the reactive dynamics which includes two processes. In one case the reactive metal breaks up into smaller fragments as rapidly as the reaction rate, and in the other a crust grows on the liquid fragments as the reactions occur, a diffusion limited process. In the latter case, the particle diameters increase with time as the crust grows. In this process, which is indicated by the data, particles breakup as the CeD${}_2$ loses strength with increasing temperature, leaving an exponentially increasing diameter.

该手稿研究了喷射的反应性与流体动力分解过​​程。在本研究中，反应性金属为铈（Ce），非反应性金属为锡（Sn），非反应性气体为氦气（He），反应性气体为氘（D${}_2$）或氢（H${}_2$）。实验是在真空，反应性气体和非反应性气体在各种压力下进行的，我们努​​力匹配休克后的气体密度，以区分反应性和流体动力分解过​​程。流体动力破裂与韦伯数（气体密度，液体碎片直径，表面张力以及碎片与气体之间的相对速度的平方）敏感地相关，而反应性破裂与包括两个过程的反应动力学有关。在一种情况下，反应性金属会按照反应速率迅速分解成较小的碎片，而在另一种情况下，随着反应的发生，在液体碎片上会形成一层硬壳，这是扩散受限的过程。在后一种情况下，随着地壳的增长，粒径随时间增加。在此过程中，数据表明，${}_2$ 随温度升高而失去强度，使直径成指数增加。