Measurement of air shower cores to study the cosmic ray composition in theknee energy region - art. no. 072007

Amenomori, M Ayabe, S",Caidong,Danzengluobu,"Ding, LK Feng, ZY Fu, Y Guo, HW He, M Hibino, K Hotta, N Huang, Q Huo, AX Izu, K Jia, HY Kajino, F Kasahara, K Katayose, Y",Labaciren,"Li, JY Lu, H Lu, SL Luo, GX Meng, XR Mizutani, K Mu, J Nanjo, H Nishizawa, M Ohnishi, M Ohta, I Ouchi, T Peng, ZR Ren, JR Saito, T Sakata, M Sasaki, T Shi, ZZ Shibata, M Shiomi, A Shirai, T Sugimoto, H Taira, K Tan, YH Tateyama, N Torii, S Utsugi, T Wang, CR Wang, H Xu, XW Yamamoto, Y Yu, GC Yuan, AF Yuda, T Zhang, CS Zhang, HM Zhang, JL Zhang, NJ Zhang, XY",Zhaxiciren,Zhaxisangzhu

M. Amenomori et al., Measurement of air shower cores to study the cosmic ray composition in theknee energy region - art. no. 072007, PHYS REV D, 6207(7), 2000, pp. 2007

23

INGLESE

Article

Physics

PHYSICAL REVIEW D

0556-2821 → ACNP

6207

7

2000

ISI

0556-2821(20001001)6207:7<2007:MOASCT>2.0.ZU;2-C

Since 1996, a hybrid experiment consisting of an emulsion chamber and a bur st detector array and the Tibet-II air-shower array has been operated at Ya ngbajing (4300 m above sea level) in Tibet. This experiment can detect air shower cores, called burst events, accompanied by air showers in excess of about 100 TeV. Using the burst event data observed by this experiment, we d iscuss the primary cosmic ray composition around the knee in comparison wit h the Monte Carlo simulations. In this paper, we show that all the features of burst events are wholly compatible with the heavy enriched composition in the knee energy region.