S
S. J. Ra
Publications - 37
Citations - 776
S. J. Ra is an academic researcher. The author has contributed to research in topics: Dark matter & WIMP. The author has an hindex of 12, co-authored 30 publications receiving 533 citations.
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Journal ArticleDOI
Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment
Govinda Adhikari,P. Adhikari,E. Barbosa de Souza,N. Carlin,S. Choi,Mitra Djamal,A. C. Ezeribe,C. Ha,Insik Hahn,Eunju Jeon,J. H. Jo,H. W. Joo,Woosik Kang,Won Nam Kang,M. Kauer,G. S. Kim,H. Kim,H. J. Kim,K. W. Kim,Nam Young Kim,S. K. Kim,Y. D. Kim,Yong Hamb Kim,Y. J. Ko,V. A. Kudryavtsev,Hyun Su Lee,J.H. Lee,Joo Young Lee,Moo Hyun Lee,David Leonard,W. A. Lynch,Reina H. Maruyama,F. Mouton,Stephen L. Olsen,B. J. Park,Hyangkyu Park,Hansoo Park,Kangsoon Park,R. L. C. Pitta,H. Prihtiadi,S. J. Ra,Carsten Rott,K. A. Shin,A. Scarff,N. J. C. Spooner,W. G. Thompson,Liang Yang,G. H. Yu +47 more
TL;DR: New constraints on the dark matter-induced annual modulation signal are presented using 1.7 years of COSINE-100 data with a total exposure of 97 kg yr and best fit values for modulation amplitude and phase are observed.
Journal ArticleDOI
An experiment to search for dark-matter interactions using sodium iodide detectors
Govinda Adhikari,P. Adhikari,Estella Barbosa de Souza,N. Carlin,Seonho Choi,Mitra Djamal,A. C. Ezeribe,C. Ha,Insik Hahn,A. J. F. Hubbard,Eunju Jeon,J. H. Jo,H. W. Joo,Woon Gu Kang,Woosik Kang,M. Kauer,B. C. Kim,Hongjoo Kim,H. Kim,K. W. Kim,Nam Young Kim,Sun Kee Kim,Yeongduk Kim,Yong-Hamb Kim,Y. J. Ko,V. A. Kudryavtsev,Hyun Su Lee,Jongmin Lee,Joo Young Lee,Moo Hyun Lee,D. S. Leonard,W. A. Lynch,Reina H. Maruyama,F. Mouton,Stephen L. Olsen,B. J. Park,Hyang Kyu Park,Hyeonseo Park,J.S. Park,Kangsoon Park,Walter C. Pettus,H. Prihtiadi,S. J. Ra,Carsten Rott,A. Scarff,K. A. Shin,N. J. C. Spooner,W. G. Thompson,Liang Yang,S.H. Yong +49 more
TL;DR: In this paper, the COSINE-100 experiment was used to determine whether there is evidence for an excess of events above the expected background in sodium iodide and to look for evidence of an annual modulation.
Journal ArticleDOI
Initial performance of the COSINE-100 experiment
Govinda Adhikari,P. Adhikari,E. Barbosa de Souza,N. Carlin,Seonho Choi,W. Q. Choi,W. Q. Choi,Mitra Djamal,A. C. Ezeribe,C. Ha,Insik Hahn,A. J. F. Hubbard,A. J. F. Hubbard,Eunju Jeon,J. H. Jo,H. W. Joo,W.G. Kang,W. Kang,M. Kauer,B.H. Kim,H. Kim,Hongjoo Kim,K. W. Kim,M.C. Kim,M.C. Kim,N.Y. Kim,Sun Kee Kim,Y.D. Kim,Yong Hamb Kim,V. A. Kudryavtsev,Hyun Su Lee,Jimmy H. M. Lee,Joo Young Lee,Moo Hyun Lee,D. S. Leonard,K. E. Lim,W. A. Lynch,Reina H. Maruyama,F. Mouton,Stephen L. Olsen,Hyang Kyu Park,Hansoo Park,J.S. Park,Kangsoon Park,Walter C. Pettus,Walter C. Pettus,Z. P. Pierpoint,H. Prihtiadi,S. J. Ra,F. R. Rogers,F. R. Rogers,Carsten Rott,A. Scarff,A. Scarff,N. J. C. Spooner,W. G. Thompson,Liang Yang,S.H. Yong +57 more
TL;DR: COSINE-100 as mentioned in this paper is a dark matter search experiment based on an array of low background NaI(Tl) crystals located at the Yangyang underground laboratory in China.
Journal ArticleDOI
An experiment to search for dark matter interactions using sodium iodide detectors
Govinda Adhikari,P. Adhikari,Estella Barbosa de Souza,N. Carlin,Seonho Choi,Mitra Djamal,A. C. Ezeribe,C. Ha,Insik Hahn,A. J. F. Hubbard,Eunju Jeon,J. H. Jo,H. W. Joo,Woon Gu Kang,Woosik Kang,M. Kauer,B. C. Kim,H. Kim,Hongjoo Kim,K. W. Kim,Nam Young Kim,Sun Kee Kim,Yeongduk Kim,Yong-Hamb Kim,Y. J. Ko,V. A. Kudryavtsev,Hyun Su Lee,Jongmin Lee,Joo Young Lee,Moo Hyun Lee,D. S. Leonard,W. A. Lynch,Reina H. Maruyama,F. Mouton,Stephen L. Olsen,B. J. Park,Hyang Kyu Park,Hyeonseo Park,J.S. Park,Kangsoon Park,Walter C. Pettus,H. Prihtiadi,S. J. Ra,Carsten Rott,A. Scarff,K. A. Shin,N. J. C. Spooner,W. G. Thompson,Liang Yang,S.H. Yong +49 more
TL;DR: In this article, the authors report results from the initial operation of the COSINE-100 experiment, which uses sodium iodide as the target medium and is designed to carry out a model independent test of DAMA's claim.
Journal ArticleDOI
Background model for the NaI(Tl) crystals in COSINE-100
P. Adhikari,Govinda Adhikari,E. Barbosa de Souza,N. Carlin,Seonho Choi,W. Q. Choi,Mitra Djamal,A. C. Ezeribe,C. Ha,Insik Hahn,A.J.F. Hubbard,Eunju Jeon,J. H. Jo,H. W. Joo,Woon Gu Kang,M. Kauer,W. Kang,B.H. Kim,Hongjoo Kim,H. J. Kim,K. W. Kim,M.C. Kim,Nam Young Kim,S. K. Kim,Y.D. Kim,Yong Hamb Kim,V. A. Kudryavtsev,Hyun Su Lee,Ju-Yeol Lee,J. Y. Lee,Moo Hyun Lee,David Leonard,W.A. Lynch,Reina H. Maruyama,F. Mouton,Stephen L. Olsen,Hyangkyu Park,Hansoo Park,J.S. Park,Kangsoon Park,Walter C. Pettus,H. Prihtiadi,S. J. Ra,Carsten Rott,A. Scarff,N. J. C. Spooner,W. G. Thompson,Liang Yang,S.H. Yong +48 more
TL;DR: To understand measured backgrounds in the NaI(Tl) crystals, Monte Carlo simulations using the Geant4 toolkit are performed and background models for each crystal are developed that consider contributions from both internal and external sources, including cosmogenic nuclides.