Alpha backgrounds in NaI(Tl) crystals of COSINE-100

  • Adhikari, G.; 
  • Carlin, N.; 
  • Cavalcante, D. F. F. S.; 
  • Cho, J. Y.; 
  • Choi, J. J.; 
  • ... Kim, H. J.; 
  • 외 56명
Citations

WEB OF SCIENCE

5
Citations

SCOPUS

6

초록

COSINE -100 is a dark matter direct detection experiment with 106 kg NaI(Tl) as the target material. 210Pb and daughter isotopes are a dominant background in the WIMP region of interest and are detected via ������ decay and a decay. Analysis of the a channel complements the background model as observed in the ������/������ channel. We present the measurement of the quenching factors and Monte Carlo simulation results and activity quantification of the a decay components of the COSINE -100 NaI(Tl) crystals. The data strongly indicate that the a decays probabilistically undergo two possible quenching factors but require further investigation. The fitted results are consistent with independent measurements and improve the overall understanding of the COSINE -100 backgrounds. Furthermore, the half-life of 216Po has been measured to be 143.4 +/- 1.2 ms, which is consistent with and more precise than most current measurements.

키워드

NaI(Tl); 210Pb; 210Po; 232Th; 216Po; Half-life; Alpha; Quenching
제목
Alpha backgrounds in NaI(Tl) crystals of COSINE-100
저자
Adhikari, G.; Carlin, N.; Cavalcante, D. F. F. S.; Cho, J. Y.; Choi, J. J.; Choi, S.; Ezeribe, A. C.; Franca, L. E.; Haf, C.; Hahn, I. S.; Hollick, S. J.; Jeon, E. J.; Joo, H. W.; Kang, W. G.; Kauer, M.; Kim, B. H.; Kim, H. J.; Kim, J.; Kim, K. W.; Kim, S. H.; Kim, S. K.; Kim, S. W.; Kim, W. K.; Kim, Y. D.; Kim, Y. H.; Ko, Y. J.; Lee, D. H.; Lee, E. K.; Lee, H.; Lee, H. S.; Lee, H. Y.; Lee, I. S.; Lee, J.; Lee, J. Y.; Lee, M. H.; Lee, S. H.; Lee, S. M.; Lee, Y. J.; Leonard, D. S.; Luank, N. T.; Manzato, B. B.; Maruyama, R. H.; Neal, R. J.; Nikkel, J. A.; Olsen, S. L.; Park, B. J.; Park, H. K.; Park, H. S.; Park, J. C.; Park, K. S.; Park, S. D.; Pitta, R. L. C.; Prihtiadi, H.; Ra, S. J.; Rott, C.; Scarff, A.; Shin, K. A.; Son, M. K.; Spooner, N. J. C.; Truc, L. T.; Yang, L.; Yu, G. H.
DOI
10.1016/j.astropartphys.2024.102945
발행일
2024-06
유형
Article
저널명
Astroparticle Physics
권
158