Palladium-103 decays through electron capture to excited levels of ¹⁰³Rh, and especially to the 39.748-keV metastable state. A high activity palladium chloride solution was standardized by liquid scintillation, using the Triple-to-Double Coincidence Ratio method. The absolute photon emission intensities were determined by gamma-ray spectrometry using point sources prepared with the standard solution. Different detectors and measuring conditions were used to cross-reference the results. The most intense photon emission intensities are derived with about 1% relative combined standard uncertainty.

中文翻译：

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从103Pd的衰减中测量绝对伽马射线的发射强度

钯103通过电子捕获而衰减到¹⁰³ Rh的激发能级，尤其是39.748-keV的亚稳态。使用三重对重合比率法，通过液体闪烁将高活性氯化钯溶液标准化。使用标准溶液制备的点光源，通过伽马射线光谱测定法确定绝对光子发射强度。使用不同的检测器和测量条件来交叉引用结果。最强的光子发射强度是由大约1％的相对组合标准不确定度得出的。