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Timing & charge yield of Surface and Bulk event

Timing & charge yield of Surface and Bulk event

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Timing & charge yield of Surface and Bulk event. EDEWEISS. Liquid scintillation detector. Large mass More information. XENON ：液态氙实验的屏蔽和宇宙线反符合. 5cm 高纯无氧铜. 20cm 铅. 20cm 聚乙烯. Ionization and Scintillation of Xenon. Transparence layer. Signals from XENON10. LXe 内部放射性. LAr 内部放射性. - PowerPoint PPT Presentation

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Page 1: Timing & charge yield of Surface and Bulk event

Timing & charge yield of Surface and Bulk event

Page 2: Timing & charge yield of Surface and Bulk event
Page 3: Timing & charge yield of Surface and Bulk event

EDEWEISS

Page 4: Timing & charge yield of Surface and Bulk event

Liquid scintillation detector

Large massMore information

Page 5: Timing & charge yield of Surface and Bulk event

20cm 聚乙烯

20cm 铅

5cm 高纯无氧铜

XENON ：液态氙实验的屏蔽和宇宙线反符合

Page 6: Timing & charge yield of Surface and Bulk event

Ionization and Scintillation of Xenon

Page 7: Timing & charge yield of Surface and Bulk event
Page 8: Timing & charge yield of Surface and Bulk event

Transparence

layer

Page 9: Timing & charge yield of Surface and Bulk event

Signals from XENON10

Page 10: Timing & charge yield of Surface and Bulk event
Page 11: Timing & charge yield of Surface and Bulk event

LXe 内部放射性

Page 12: Timing & charge yield of Surface and Bulk event

LAr 内部放射性

衰变方式 放射性核素 含量222Rn

T1/2 = 3.8 d , , 原生 238U 1 - ?00 Bq/m3 air

85Kr T1/2 = 10.8 y (687 keV) , 235U 裂变 1.4 Bq/m3 air

39Ar T1/2 = 269 y (565 keV) 宇生放射性 1.8 Bq/m3 Ar

42Ar T1/2 = 32.9 y (600 keV) 宇生放射性 50 µBq/m3 Ar

Page 13: Timing & charge yield of Surface and Bulk event

相对闪烁荧光效率和抑制因子

Page 14: Timing & charge yield of Surface and Bulk event

小结• 目前的探测器技术在高质量区域的测量比较可靠，也

可信，高质量区域测量的问题较多。

• 在低质量区的问题：电子学噪声，探测器自身本底，抑制因子， DSP 技术

• 降低测量阈值不仅有利低质量的探测，也有利于高质量的探测。

• 两个发展方向： 低阈，低本底，

• 我国的 CJPL 为 DM 的研究提供了很好条件，望理论和实验加强合作

Page 15: Timing & charge yield of Surface and Bulk event

Thanks


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