痕量同位素设定液氩的中子视界

中文摘要 AI 辅助

在接近57 keV能量处，破坏性干涉使氩-40对中子几乎透明。天然氩中0.4%的氩-36和氩-38提供了其超过90%的阻光能力，并被放大了230倍。已发表的透射数据排除了FLUKA默认使用的氩-36评估值，即使将所有其他同位素设为透明也是如此，并将该能量窗口内的截面限制在2至11靶恩之间。在DUNE规模探测器中，改用与数据一致的评估值会使氩-41校准俘获的视在比例变化9%至13%，而总产额仅变化2%：其影响在于俘获发生的位置，而非数量。

英文摘要

Near 57 keV, destructive interference makes argon-40 almost transparent to neutrons. The 0.4% of argon-36 and argon-38 in natural argon then supply over 90% of its opacity, amplified 230-fold. Published transmission data rule out the argon-36 evaluation FLUKA uses by default, even with every other isotope made transparent, and bound its cross section in the window to 2-11 b. In a DUNE-scale detector, switching to the data-consistent evaluations moves the fiducial fraction of argon-41 calibration captures by 9-13% while the total yield changes by only 2%: the effect is on where captures occur, not how many.

发表机构

• Gulf University for Science and Technology（海湾科学技术大学）

机构由 AI 辅助整理，请以论文原文为准。