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arXiv 1104.0894astro-ph.IM
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绝对空气荧光产额的现有测量结果的比较及其全球平均值的确定

Comparison of available measurements of the absolute air-fluorescence yield and determination of its global average value

J. Rosado, F. Blanco, F. Arqueros

摘要:

绝对空气荧光产额的实验结果经常以不同的单位(光子/MeV或光子/m)和不同的波长间隔给出。在这项工作中,我们提出了一个比较可用的结果归一化到其值的光子/MeV的337 nm波段在1013 hPa和293 K。将光子/m转换为光子/MeV需要准确确定实验装置视场中电子沉积的能量。我们用详细的蒙特卡罗模拟计算了每个实验的能量沉积,并与作者的假设或计算结果进行了比较。因此,建议报告的荧光产率的校正。这些修正改善了测量之间的兼容性,从而获得了不确定度为5%的可靠平均值。

英文摘要:

Experimental results of the absolute air-fluorescence yield are given very often in different units (photons/MeV or photons/m) and for different wavelength intervals. In this work we present a comparison of available results normalized to its value in photons/MeV for the 337 nm band at 1013 hPa and 293 K. The conversion of photons/m to photons/MeV requires an accurate determination of the energy deposited by the electrons in the field of view of the experimental set-up. We have calculated the energy deposition for each experiment by means of a detailed Monte Carlo simulation and the results have been compared with those assumed or calculated by the authors. As a result, corrections to the reported fluorescence yields are proposed. These corrections improve the compatibility between measurements in such a way that a reliable average value with uncertainty at the level of 5% is obtained.

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