Beryllium‐10 (t_1/2 = 1.4 Ma) is a short‐lived radionuclide present in the early Solar System. It is produced solely by irradiation reactions and can provide constraints on the astrophysical environment of the Sun’s formation. Calcium‐ and aluminium‐rich inclusions (CAIs), the first solids formed in the Solar System, show clear evidence for live ¹⁰Be at their time of formation, but it is unclear whether they record the same initial ¹⁰Be/⁹Be ratio. In this study, we examine the secondary ion mass spectrometry methods used to determine the initial ¹⁰Be/⁹Be ratio in meteoritic inclusions. Based on analyses of synthesised matrix‐matched glass reference materials, we show that the effects of differing major element bulk compositions on the secondary ion yields of Be and B are minor for relevant phases. We demonstrate the importance of using the mean square weighted deviation (MSWD) to interpret the significance of the initial ¹⁰Be/⁹Be value. For thirty‐two CAIs, we re‐calculated the regressions using literature data, finding that several have unacceptably high MSWD. We calculate the effects of possible sources of isotopic disturbance. Finally, we outline best practices for reporting ¹⁰Be–¹⁰B data, to enable a more refined determination of the initial ¹⁰Be/⁹Be ratio in the early Solar System.

中文翻译：

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通过二次离子质谱法测定早期太阳系材料中初始10Be / 9Be的最佳实践

铍10（t _1/2  = 1.4 Ma）是早期太阳系中存在的一种短寿命放射性核素。它仅通过辐射反应产生，并且可以限制太阳形成的天体环境。富含钙和铝的夹杂物（CAIs）是太阳系中形成的首批固体，在形成时显示出活的¹⁰ Be的明确证据，但尚不清楚它们是否记录了相同的初始¹⁰ Be / ⁹ Be比率。在这项研究中，我们研究了用于确定初始¹⁰ Be / ⁹的二次离子质谱法是比例的陨石包裹体。基于对合成的与基质匹配的玻璃参考材料的分析，我们表明，对于相关相，不同的主要元素本体组成对Be和B的次级离子收率的影响较小。我们证明了使用均方加权偏差（MSWD）来解释初始¹⁰ Be / ⁹ Be值的重要性的重要性。对于32个CAI，我们使用文献数据重新计算了回归，发现其中一些具有不可接受的高MSWD。我们计算出同位素干扰可能来源的影响。最后，我们概述了报告¹⁰ Be– ¹⁰ B数据的最佳做法，以便能够更精确地确定最初的¹⁰ Be /⁹在早期的太阳系中保持平衡。