BROWSE

Related Scientist

Kevin Insik, Hahn's photo.

Kevin Insik, Hahn
희귀 핵 연구단
more info

ITEM VIEW & DOWNLOAD

Background modeling for dark matter search with 1.7 years of COSINE-100 data

Cited 0 time in webofscience Cited 0 time in scopus
17 Viewed 0 Downloaded
Title
Background modeling for dark matter search with 1.7 years of COSINE-100 data
Author(s)
Adhikari, G.; de Souza, E. Barbosa; Carlin, N.; Choi, J.J.; Choi, S.; Djamal, M.; Ezeribe, A.C.; Franca, L.E.; Ha, C.; Kevin Insik, Hahn; Jeon, Eun Ju; Jo, J.H.; Joo, H.W.; Woon Gu, Kang; Kauer, M.; Hyoun Gyu, Kim; Kim, H.J.; Kyungwon, Kim; Sung Sung, Kim; Kim, S.K.; Won Kyung Kim; Kim, Yeongduk; Kim, Yong Hamb; Ko, Young Ju; Lee, Eun Kyoung; Hyun Seok, Lee; Lee, Hyun Su; Lee, Hye Young; Lee, In Soo; Lee,, Jaison; Lee, J.Y.; Lee, Moo Hyun; Lee, S.H.; Lee, S.M.; Douglas, Leonard; Lynch, W.A.; Manzato, B.B.; Maruyama, R.H.; Neal, R.J.; Stephen Lars Olsen; Byung Ju, Park; Park, H.K.; Park, H.S.; Kang Soon, Park; Pitta, R.L.C.; Prihtiadi, H.; Se Jin, Ra; Rott, C.; Shin, Keonah; Scarff, A.; Spooner, N.J.C.; Thompson, W.G.; Yang, L.; Yu, G.H.
Publication Date
2021-09-01
Journal
European Physical Journal C, v.81, no.9
Publisher
Springer Verlag
Abstract
© 2021, The Author(s).We present a background model for dark matter searches using an array of NaI(Tl) crystals in the COSINE-100 experiment that is located in the Yangyang underground laboratory. The model includes background contributions from both internal and external sources, including cosmogenic radionuclides and surface 210Pb contamination. To build the model in the low energy region, with a threshold of 1 keV, we used a depth profile of 210Pb contamination in the surface of the NaI(Tl) crystals determined in a comparison between measured and simulated spectra. We also considered the effect of the energy scale errors propagated from the statistical uncertainties and the nonlinear detector response at low energies. The 1.7 years COSINE-100 data taken between October 21, 2016 and July 18, 2018 were used for this analysis. Our Monte Carlo simulation provides a non-Gaussian peak around 50 keV originating from beta decays of bulk 210Pb in a good agreement with the measured background. This model estimates that the activities of bulk 210Pb and 3H are dominating the background rate that amounts to an average level of 2.85 ± 0.15 counts/day/keV/kg in the energy region of (1–6) keV, using COSINE-100 data with a total exposure of 97.7 kg· years.
URI
https://pr.ibs.re.kr/handle/8788114/10348
DOI
10.1140/epjc/s10052-021-09564-0
ISSN
1434-6044
Appears in Collections:
Center for Exotic Nuclear Studies(희귀 핵 연구단) > 1. Journal Papers (저널논문)
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse