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Updated: Jan 20, 2026

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对于NUCLEUS反应堆CEν NS实验的粒子背景特性和预测

H Abele¹, G Angloher², B Arnold³

¹Atominstitut, Technische Universität Wien, Stadionallee 2, 1020 Wien, Austria.

The European physical journal. C, Particles and fields

|January 19, 2026

概括

该NUCLEUS实验将使用冷探测器测量连贯弹性中微子核散射 (CE $ν$ NS). 模拟预测了显著的背景减少,使反应堆反中微子检测成为可能.

科学领域:

粒子物理学粒子物理学
核物理核物理核物理
天体物理学天体物理学

背景情况:

反应堆中反中性子检测依赖于在亚keV能量范围内测量连贯弹性中性子核散射 (CE $ν$ NS).
了解和减轻粒子诱导的背景对于隔离CE $ν$ NS信号至关重要.
亚keV区域的特征较差,需要详细的背景预测.

研究的目的:

为NUCLEUS实验预测粒子诱导的背景,专注于次-keV能量范围.
为了优化NUCLEUS实验设置以减少背景.
通过CE $ν NS.NS来估计用于检测反应堆反中微子的残余背景速率.$

主要方法:

使用Geant4包进行了广泛的蒙特卡洛模拟.
在Chooz核电站现场进行的环境背景辐射测量被纳入其中.
核子实验设置的设计是为了高背景排斥.

主要成果:

预计NUCLEUS设置的总背景排斥功率将超过两个数量级.
宇宙射线诱导的中子被确定为主要的残余背景成分.
在CEνNS信号区域 (10-100 eV),CaWO₄探测器中预计粒子背景速率为~250d^-1kg^-1keV^-1.

结论:

预测的背景水平符合通过CE $ν NS检测反应堆反中微子所需的规格.$
预计在感兴趣的区域,信号与背景的比率大于或等于1.
NUCLEUS实验的位置很好,可以实现其测量CE $ν NS和寻找新物理学的目标.$

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