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arXiv 2011.13803physics.ins-det
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用中子俘获标定100 eV级核反冲

Calibration of nuclear recoils at the 100 eV scale using neutron capture

L. Thulliez, D. Lhuillier, F. Cappella, N. Casali, R. Cerulli, A. Chalil, A. Chebboubi, E. Dumonteil, A. Erhart, A. Giuliani, F. Gunsing, E. Jericha, M. Kaznach… 展开作者

L. Thulliez, D. Lhuillier, F. Cappella, N. Casali, R. Cerulli, A. Chalil, A. Chebboubi, E. Dumonteil, A. Erhart, A. Giuliani, F. Gunsing, E. Jericha, M. Kaznacheeva, A. Kinast, A. Langenkämper, T. Lasserre, A. Letourneau, O. Litaize, P. de Marcillac, S. Marnieros, T. Materna, B. Mauri, E. Mazzucato, C. Nones, T. Ortmann, L. Pattavina, D. V. Poda, R. Rogly, N. Schermer, O. Serot, G. Soum, L. Stodolsky, R. Strauss, M. Vignati, M. Vivier, V. Wagner, A. Wex

摘要:

为了研究中微子-核的相干弹性散射和寻找轻暗物质,研制低阈值探测器需要低能校准方法。我们认为,这可以提供由热中子俘获后的$γ$发射的核反冲。特别是,几个兆电子伏尺度的单- $γ$跃迁诱导定义良好的核反冲峰在100 eV的范围内。使用FIFRELIN程序,可以高精度地预测各种同位素的$γ$级联的完整方案,以确定校准峰以下的核反冲的连续背景。我们提出了一个全面的实验概念,在研究堆的CaWO $_4$和Ge低温探测器的校准。对于CaWO $_4$,模拟结果表明,在低温探测器的光谱中,在本底以上,112.5 eV和160.3 eV处的两个核反冲峰应该是可见的。然后,我们讨论了如何为相关的$γ$的附加标记增加的方法的灵敏度,并将其应用扩展到更广泛的能量范围和锗低温探测器。

英文摘要:

The development of low-threshold detectors for the study of coherent elastic neutrino-nucleus scattering and for the search for light dark matter necessitates methods of low-energy calibration. We suggest this can be provided by the nuclear recoils resulting from the $γ$ emission following thermal neutron capture. In particular, several MeV-scale single-$γ$ transitions induce well-defined nuclear recoil peaks in the 100 eV range. Using the FIFRELIN code, complete schemes of $γ$-cascades for various isotopes can be predicted with high accuracy to determine the continuous background of nuclear recoils below the calibration peaks. We present a comprehensive experimental concept for the calibration of CaWO$_4$ and Ge cryogenic detectors at a research reactor. For CaWO$_4$ the simulations show that two nuclear recoil peaks at 112.5 eV and 160.3 eV should be visible above background simply in the spectrum of the cryogenic detector. Then we discuss how the additional tagging for the associated $γ$ increases the sensitivity of the method and extends its application to a wider energy range and to Ge cryogenic detectors.

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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