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

Abstract

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 Monte Carlo 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) keV energy interval. The dominant contributors in this energy region are found to be 210Pb and 3H.

Metadata

Authors/Creators:

Adhikari, P.
Adhikari, G.
Souza, E.B.D.
Carlin, N.
Choi, S.
Choi, W.Q.
Djamal, M.
Ezeribe, A.C.
Ha, C.
Hahn, I.S.
Hubbard, A.J.F.
Jeon, E.J.
Jo, J.H.
Joo, H.W.
Kang, W.G.
Kauer, M.
Kang, W.S.
Kim, B.H.
Kim, H.
Kim, H.J.
Kim, K.W.
Kim, M.C.
Kim, N.Y.
Kim, S.K.
Kim, Y.D.
Kim, Y.H.
Kudryavtsev, V.A. https://orcid.org/0000-0002-7018-5827
Lee, H.S.
Lee, J.
Lee, J.Y.
Lee, M.H.
Leonard, D.S.
Lynch, W.A.
Maruyama, R.H.
Mouton, F.
Olsen, S.L.
Park, H.K.
Park, H.S.
Park, J.S.
Park, K.S.
Pettus, W.
Prihtiadi, H.
Ra, S.
Rott, C.
Scarff, A.
Spooner, N.J.C.
Thompson, W.G.
Yang, L.
Yong, S.H.

© The Author(s) 2018. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Keywords:

Instrumentation and Methods for Astrophysics (astro-ph.IM); Instrumentation and Detectors (physics.ins-det)

Dates:

Accepted: 1 June 2018
Published (online): 12 June 2018
Published: 12 June 2018

Institution:

The University of Sheffield

Academic Units:

The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield)

Funding Information:

Funder	Grant number
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL	ST/N001141/1
Science and Technology Facilities Council	ST/N000277/1
SCIENCE AND TECHNOLOGY FACILITIES COUNCIL	ST/P00573X/1

Depositing User:

Symplectic Sheffield

Date Deposited:

25 Apr 2018 11:26

Last Modified:

31 Jul 2020 14:59

Status:

Published

Publisher:

Springer Verlag

Refereed:

Yes