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arXiv 2203.01708hep-phnucl-th
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钚-241作为中微子质量测量与俘获的可能同位素

Plutonium-241 as a possible isotope for neutrino mass measurement and capture

Nicolo de Groot

AI总结:

针对氚核反冲限制中微子质量及遗迹中微子探测的问题,本文评估$^{241}$Pu,发现其反冲更小且软中微子俘获率达氚的40%。

摘要:

氚一直是中微子质量测量及计划中的遗迹中微子背景探测所选用的同位素。$^{3}$H的低质量导致原子核具有较大的反冲能量。这已成为上述两类测量的一个限制因素。我们研究$^{241}$Pu作为替代方案。其反冲小80倍,并具有与$^{3}$H相似的衰变能量和寿命。我们首次评估了它的软中微子俘获截面,得到$(σv)_ν = 1.52 \ imes 10^{-45}$。这一数值为氚俘获截面的40%,使$^{241}$Pu成为$^{3}$H的一种有吸引力的替代物。

英文摘要:

Tritium has been the isotope of choice for measurements of the neutrino mass and planned detection of the relic neutrino background. The low mass of $^{3}$H leads to large recoil energy of the nucleus. This has emerged as a limiting factor for both measurements. We investigate $^{241}$Pu as an alternative. The recoil is 80x smaller and it has similar decay energy and lifetime as $^{3}$H. We evaluate for the first time its soft-neutrino capture cross-section and find $(σv)_ν = 1.52 \times 10^{-45}$. This is 40% of the capture cross-section for tritium and makes $^{241}$Pu an interesting alternative for $^{3}$H.

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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