Understanding NaI(Tl) crystal background for dark matter searches G. Adhikari, P. Adhikari, C. Ha, E. J. Jeon, N. Y. Kim, Y. D. Kim, S. Y. Kong, H. S. Lee, S. Y. Oh, J. S. Park and K. S. Park Eur. Phys. J. C, 77 7 (2017) 437 Published online: 01 July 2017 DOI: 10.1140/epjc/s10052-017-5011-6