Background model for the NaI(Tl) crystals in COSINE-100

被引：52

作者：

Adhikari, P. ^{[1
]}

Adhikari, G. ^{[1
]}

de Souza, E. Barbosa ^{[2
]}

Carlin, N. ^{[3
]}

Choi, S. ^{[4
]}

Choi, W. Q. ^{[5
]}

Djamal, M. ^{[6
]}

Ezeribe, A. C. ^{[7
]}

Ha, C. ^{[8
]}

Hahn, I. S. ^{[9
]}

Hubbard, A. J. F. ^{[2
]}

Jeon, E. J. ^{[8
]}

Jo, J. H. ^{[2
]}

Joo, H. W. ^{[4
]}

Kang, W. G. ^{[8
]}

Kauer, M. ^{[11
,12
]}

Kang, W. S. ^{[10
]}

Kim, B. H. ^{[8
]}

Kim, H. ^{[8
]}

Kim, H. J. ^{[13
]}

Kim, K. W. ^{[8
]}

Kim, M. C. ^{[10
]}

Kim, N. Y. ^{[8
]}

Kim, S. K. ^{[4
]}

Kim, Y. D. ^{[1
,8
]}

Kim, Y. H. ^{[8
,14
]}

Kudryavtsev, V. A. ^{[7
]}

Lee, H. S. ^{[8
]}

Lee, J. ^{[8
]}

Lee, J. Y. ^{[4
]}

Lee, M. H. ^{[8
]}

Leonard, D. S. ^{[8
]}

Lynch, W. A. ^{[7
]}

Maruyama, R. H. ^{[2
]}

Mouton, F. ^{[7
]}

Olsen, S. L. ^{[8
]}

Park, H. K. ^{[16
]}

Park, H. S. ^{[14
]}

Park, J. S. ^{[8
]}

Park, K. S. ^{[8
]}

Pettus, W. ^{[2
]}

Prihtiadi, H. ^{[6
]}

Ra, S. ^{[8
]}

Rott, C. ^{[10
]}

Scarff, A. ^{[7
]}

Spooner, N. J. C. ^{[7
]}

Thompson, W. G. ^{[2
]}

Yang, L. ^{[4
,15
]}

Yong, S. H. ^{[8
]}

机构：

[1] Sejong Univ, Dept Phys & Astron, Seoul 05006, South Korea

[2] Yale Univ, Dept Phys, Wright Lab, New Haven, CT 06520 USA

[3] Univ Sao Paulo, Phys Inst, BR-05508090 Sao Paulo, Brazil

[4] Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea

[5] Korea Inst Sci & Technol Informat, Daejeon 34141, South Korea

[6] Bandung Inst Technol, Dept Phys, Bandung 40132, Indonesia

[7] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[8] Inst for Basic Sci Korea, Ctr Underground Phys, Daejeon 34126, South Korea

[9] Ewha Womans Univ, Dept Sci Educ, Seoul 03760, South Korea

[10] Sungkyunkwan Univ, Dept Phys, Seoul 16419, South Korea

[11] Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA

[12] Univ Wisconsin, Wisconsin IceCube Particle Astrophys Ctr, Madison, WI 53706 USA

[13] Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea

[14] Korea Res Inst Stand & Sci, Daejeon 34113, South Korea

[15] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[16] Korea Univ, Grad Sch, Dept Accelerator Sci, Sejong 30019, South Korea

来源：

EUROPEAN PHYSICAL JOURNAL C | 2018年 / 78卷 / 06期

基金：

美国国家科学基金会; 巴西圣保罗研究基金会;

关键词：

SEARCH; DAMA/LIBRA; PROJECT; GEANT4;

D O I：

10.1140/epjc/s10052-018-5970-2

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The COSINE-100 dark matter search experiment is an array of NaI(Tl) crystal detectors located in the Yangyang Underground Laboratory (Y2L). To understand measured backgrounds in the NaI(Tl) crystals we have performed MonteCarlo simulations using the Geant4 toolkit and developed background models for each crystal that consider contributions from both internal and external sources, including cosmogenic nuclides. The background models are based on comparisons of measurement data with Monte Carlo simulations that are guided by a campaign of material assays and are used to evaluate backgrounds and identify their sources. The average background level for the six crystals (70 kg total mass) that are studied is 3.5 counts/day/keV/kg in the (2-6) keVenergy interval. The dominant contributors in this energy region are found to be Pb-210 and H-3.

引用

页数：10

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