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arXiv 2212.06286physics.ins-dethep-ex
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气态和液态氩的平均激发能评估

Evaluation of the mean excitation energy of gaseous and liquid argon

M. Strait

AI总结:

本研究评估了气态和液态氩的平均激发能(I值),通过新计算和现有数据推荐气态氩为(187±4) eV,液态氩为(197±7) eV,以改进阻止本领的精度。

摘要:

当前和未来的实验需要了解液态氩的阻止本领。它直接用于校准,其中通常使用μ子径迹的最小电离部分作为标准烛光。类似地,μ子射程被用作μ子能量的度量。更广泛地说,阻止本领参与所有带电粒子的模拟,因此其不确定性会在各种数据分析中广泛传播。控制阻止本领的主要参数是平均激发能,即I值。氩的I值的直接实验信息主要来自气态氩的测量,来自固态氩的信息非常有限,而来自液态氩的信息则没有。另一个强大的间接信息来源是振子强度分布计算。我们进行了一项新的计算,发现仅凭振子强度信息,气态氩的I值为$(187\pm 5)$\\,eV。结合直接测量和其他计算,我们推荐气态氩的I值为$(187\pm 4)$\\,eV。对于液态氩,我们评估了由相变差异引起的中心值和不确定性的差异,并推荐$(197\pm 7)$\\,eV。所有不确定性均以68%置信水平给出。

英文摘要:

Current and future experiments need to know the stopping power of liquid argon. It is used directly in calibration, where commonly the minimum-ionizing portion of muon tracks is used as a standard candle. Similarly, muon range is used as a measure of muon energy. More broadly, the stopping power figures into the simulation of all charged particles, and so uncertainty propagates widely throughout data analysis of all sorts. The main parameter that controls stopping power is the mean excitation energy, or I-value. Direct experimental information for argon's I-value come primarily from measurements of gaseous argon, with a very limited amount of information from solid argon, and none from liquid argon. A powerful source of indirect information is also available from oscillator strength distribution calculations. We perform a new calculation and find that from oscillator strength information alone, the I-value of gaseous argon is $(187\pm 5)$\,eV. In combination with the direct measurements and other calculations, we recommend $(187\pm 4)$\,eV for gaseous argon. For liquid argon, we evaluate the difference in central value and uncertainty incurred by the difference of phase and recommend $(197\pm 7)$\,eV. All uncertainties are given to 68\% C.L.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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