SOLAR WIND IMPLANTATION MODEL FOR 10Be IN CALCIUM–ALUMINUM INCLUSIONS
SOLAR WIND IMPLANTATION MODEL FOR 10Be IN CALCIUM–ALUMINUM INCLUSIONS
复制标题
钙铝包裹体中 10Be 的太阳风注入模型
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
M. Caffee
中科院分区：
文献类型：
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作者：
G. E. Bricker;M. Caffee
我们提出了一个在原始碳质陨石的钙铝包裹体（CAI）中掺入 10Be 的模型。在此模型中，10Be 是由更活跃的原太阳的原太阳大气中的高能粒子反应产生的，其特征是高能粒子通量高于当代粒子通量。 10Be 被纳入太阳风中，然后被植入 CAI 前体材料中。这种生产机制在当代太阳系中运行，将 10Be 植入月球材料中。当前太阳表面 10Be 的生产率为 ∼0.1 10Be cm−2 s−1。将原太阳中当代 10Be 的产量扩大 105 倍，产量将增加至 104 10Be cm−2 s−1。利用这种增强的生产值以及来自原太阳的 0.06 AU 的难熔物质流入速率，我们对 CAI 前体中的 10Be 浓度进行了建模。我们计算出 CAI 中太阳风注入的 10Be 含量约为 1012 10Be g−1 量级，与 CAI 中硼铍同位素系统发现的初始 10Be 含量一致。
We propose a model for the incorporation of 10Be within calcium–aluminum inclusions (CAIs) in primitive carbonaceous meteorites. In this model, 10Be is produced by energetic particle reactions in the proto-solar atmosphere of a more active proto-Sun characterized by energetic particle fluxes higher than contemporary particle fluxes. This 10Be is incorporated into the solar wind that is then implanted into CAI precursor material. This production mechanism is operational in the contemporary solar system implanting 10Be in lunar materials. The contemporary production rate of 10Be at the surface of the Sun is ∼0.1 10Be cm−2 s−1. Scaling up the contemporary 10Be production in the proto-Sun by a factor of 105 would increase the production rate to 104 10Be cm−2 s−1. Using this enhanced production value in conjunction with refractory mass inflow rates at 0.06 AU from the proto-Sun we model 10Be concentrations in CAI precursors. We calculate the content of solar-wind-implanted 10Be would have been of the order of 1012 10Be g−1 in CAIs, consistent with initial10Be content found from boron–beryllium isotopic systematics in CAIs.