Evidence for changing of cosmic ray composition between 10(17) and 10(18) eV from multicomponent measurements

Authors
Abu-Zayyad, T Belov, K Bird, DJ Boyer, J Cao, Z Catanese, M Chen, GF Clay, RW Covault, CE Cronin, JW Dai, HY Dawson, BR Elbert, JW Fick, BE Fortson, LF Fowler, JW Gibbs, KG Glasmacher, MAK Green, KD Ho, Y Huang, A Jui, CC Kidd, MJ Kieda, DB Knapp, BC Ko, S Larsen, CG Lee, W Loh, EC Mannel, EJ Matthews, J Matthews, JN Newport, BJ Nitz, DF Ong, RA Simpson, KM Smith, JD Sinclair, D Sokolsky, P Sommers, P Song, C Tang, JKK Thomas, SB van der Velde, JC Wiencke, LR Wilkinson, CR Yoshida, S Zhang, XZ
Citation
T. Abu-zayyad et al., Evidence for changing of cosmic ray composition between 10(17) and 10(18) eV from multicomponent measurements, PHYS REV L, 84(19), 2000, pp. 4276-4279
Citations number
22
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
84
Issue
19
Year of publication
2000
Pages
4276 - 4279
Database
ISI
SICI code
0031-9007(20000508)84:19<4276:EFCOCR>2.0.ZU;2-J
Abstract
The average mass composition of cosmic rays with primary energies between 1 0(17) and 10(18) eV has been studied using a hybrid detector consisting of the High Resolution Fly's Eye (HiRes) prototype and the MIA muon array. Mea surements have been made of the change in the depth of shower maximum and t he muon density as a function of energy. The results show that the composit ion is changing from a heavy to lighter mix as the energy increases.